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          Gem Price Guide

          Summary
          The IGS Gem Price Guide covers commonly traded colored gemstones as well as more unusual, collectible gems. The values listed below are based on a variety of sources, including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers.
          Reading time: 4 min
          kunzite - gem price guide

          Kunzite is the pink variety of the mineral spodumene. Finding a faceted kunzite, like this large, 720-ct gem from Brazil, is unusual, since this material is extremely difficult to cut and wear as a jewelry stone. Photo ? Joel E. Arem, PhD, FGA. Used with permission.

          How to Use the IGS Gem Price Guide

          A faceted gem’s price is based on an evaluation of its physical and optical properties. These are often referred to as the “Four Cs” — color, clarity, cut, and carat. (Here’s a handy introduction to how gemologists grade those properties).

          However, despite well-established grading systems for color, clarity, and cut, any evaluation of these properties is inherently subjective. Even gemologists and appraisers may disagree about the quality of a specific stone, so disagreements regarding gem prices do occur.

          Ultimately, the price of a gem is what one willing buyer and one willing seller can actually agree upon. Our gem price guide is just that — a guide. Keep in mind that gems are sold outside these price ranges every day. See our article on pricing faceted gems for more information.

          Prices listed are retail in US dollars. Wholesale is generally?one third of retail. High-end gems are often marked up 30% or less, while low-priced, more “commercial quality” faceted gems are often marked up considerably more.

          Unless otherwise noted, all prices listed below are for cut gems, not rough or raw crystal forms, and all?weights are in carats.

          Click here for more information on gem prices and grading.
          emerald - gem price guide

          Many factors can influence the price of emerald gems, including their origins. For a more in-depth explanation of these factors, consult our emerald buying guide. 2.02-ct emerald, Zambia. Photo courtesy of liveauctioneers.com and Jasper52.

          Appraisals

          If you’re not familiar with gem grading or pricing, consider getting an appraisal before buying or selling a gemstone. However, bear in mind that there are no regulations governing who can appraise gems, so carefully review the credentials of prospective appraisers. Choose an appraiser from a well-respected gemological organization or a reputable gem trader with experience dealing in the specific gem you’re interested in.

          Gemstone Properties

          Color

          Many of the gems listed below have color descriptions. Some just have simple color names — red, purple, etc. Others also have codes with abbreviations and numbers, such as “slpR 5/5.” See Spinel, for example. Those codes are gem color grades from the Gemological Institute of America (GIA) color grading system. For a brief explanation of the codes, read this article. Consult our article on gemstone color grading for more information.

          amethyst - color grades - gem price guide

          This 10.35-ct amethyst has a GIA color grade of vP 5/5. That means a violetish purple hue, a medium tone, and a strong saturation. ? RSA Gems. Used with permission.

          Clarity

          Some of the gems listed below have clarity descriptions such as “clean” or “eye clean.” Other gems have coded clarity grades, such as “VVS” and “SI/I.” See Emerald and Sapphire, for example. For a brief explanation of the GIA clarity codes, read this article. For more detailed information, consult our article on clarity types and grades for colored gemstones.

          eye-clean aquamarine - gem price guide

          This 6.48-ct aquamarine has an “eye clean” clarity. This means it has no evident clarity flaws visible to the unaided eye. (As a “Type I” gem in the GIA clarity grading system, aquamarines are usually eye clean). ? The Gem Trader. Used with permission.

          Cut

          Colored gemstone cutting can be difficult to evaluate, but its effects will be apparent to your eyes and your wallet. Consult our article on evaluating the cut for more information.

          Some of the gem values listed below distinguish between faceted and cabbed stones. Others?refer to specific types of faceted gem cuts, such as rounds, ovals, pears, etc. This overview of the lapidary arts will introduce you to the basic types of gem cutting — faceting, cabbing, tumbling, and carving. To learn more about specific faceted cuts, see our articles on fancy gem cuts and cutting styles.

          Portuguese-cut Oregon sunstone - gem price guide

          This 2.52-ct Oregon sunstone has a classic, round Portuguese cut. ? Dan Stair Custom Gemstones. Used with permission.

          Carat

          One carat equals 0.20 grams. Unlike the other Cs, carats can be objectively measured and confirmed.

          Note that some gems have increases in prices per carat at specific weights. Some gems actually see a decrease in price per carat as they get larger. To learn about gem weight and value, check out our article on carats and gem grading.

          The IGS Gem Price Guide

          You can click on the links below to go directly to the listing for a specific gem.

          Actinolite Value

          Accompanying value information:
          Cut Weight Price
          Cat’s Eye 1 carat /ct
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          Agate Value

          Cabochons All Sizes
          Agate $.50 to /ct
          Fire Agate to /ct
          Blue Chalcedony to /ct
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          Alexandrite Value

          Top Color: G 5/2 and R or slpR 5/3
          Faceted to .5 carat .5 to 1 carat 1 carat plus
          Top Red/Green to /ct to /ct to ,000/ct
          Medium Red/Green to to /ct to ,000/ct
          Slight Red/Green to /ct to /ct
           
          Cabochons .3 to 1.5 carat 1.5 carats plus
          Strong red/green to /ct to ,000/ct
           
          Cat’s Eye All sizes
          Strong red/green to /ct
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          Allanite Value

          All sizes
          Faceted to /ct
          Cabochons to /ct
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          Amber Value

          Cabochons All sizes
          With insect inclusions - per gram
          Plain cabochons - per gram
          Prices may be higher for pieces with inclusions of rare insects.
          Faceted All sizes
          Beads or drops - per gram
          Amber is rarely faceted. Please Note:?Amber is commonly sold by grams, not carats. 1 gram = 5 carats.
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          Amethyst Value

          Top Color: P, bP 7/5
          Faceted .5 to 1 carat 1 carat plus
          Siberian to /ct to /ct
          Medium to /ct to /ct
          Light to /ct to /ct
           
          Cabochons 1 carat plus
          Dark to /ct
          Medium to /ct
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          Ammolite Value

          All sizes
          Naturals to /ct
          Doublets to /ct
          Triplets to /ct
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          Andalusite Value

          Accompanying value information:
          Top Color: YG 5/2 and O 5/4
          Faceted 1 to 4 carats 4 carats plus
          Top color to /ct to ,000/ct
          Medium color to /ct to /ct
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          Anglesite Value

          Accompanying value information:
          Faceted 10 carat plus
          to /ct
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          Apatite Value

          Accompanying value information:
          Faceted .3 to 1 carat 1 to 3 carats 3 carats plus
          “Neon Blue” to /ct to /ct to /ct
          Brazil Blue to /ct to /ct to /ct
          Blue Cat’s Eye 3 carats plus
          to /ct
          OTHER COLORS
          Faceted All sizes
          to /ct
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          Apophyllite Value

          Accompanying value information:
          Faceted 3 to 10 carats
          to /ct
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          Aquamarine Value

          Top Color: GB 4/4
          Faceted .5 to 1.5 carats 1.5 to 3 carats 3 carat plus
          Dark to /ct to /ct to /ct
          Medium to /ct to /ct to /ct
          Light to /ct to to /ct
          Cabochons All Sizes
          Plain to /ct
          Cat’s Eye to /ct
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          Aragonite Value

          Accompanying value information:
          Faceted 5 carats plus
          to /ct
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          Axinite Value

          Accompanying value information:
          Faceted 1 to 5 carats
          to /ct
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          Azurite Value

          Accompanying value information:
          Cabochons All sizes
          to /ct
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          Barite Value

          Accompanying value information:
          Faceted 1 carat plus
          Yellow to /ct
          Colorless to /ct
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          Benitoite Value

          Accompanying value information:
          Faceted .1 to .5 carats .5 to 1 carat 1 carat plus
          to /ct to /ct to ,000/ct
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          Beryl Value

          Accompanying value information:
          Red .1 to 1 carat 1 carat plus
          to ,000/ct to ,000/ct
          Fine Color Morganite: slpR 3/4
          Morganite 1 to 10 carats 10 carat plus
          to /ct to /ct
          Fine Color Yellow: Y 4/4
          Gold & Yellow 1 to 10 carats 10 carat plus
          to /ct to /ct
          Fine Color Green: slyG 4/3
          Green 1 to 20 carats 20 carats plus
          to /ct to /ct
          Goshenite All sizes
          to /ct
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          Brazilianite Value

          Accompanying value information:
          Faceted 1 carat plus
          to /ct
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          Bytownite Value

          Accompanying value information:
          Faceted 1 to 3 carats
          TO /ct
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          Calcareous Concretions / Non-Nacreous Pearls Value

          Conch Pearls
          Accompanying value information:
          All sizes
          to ,000/ct
          Tridacna Pearls
          Accompanying value information:
          All Sizes
          - / ct
          Melo Pearls
          Accompanying value information:
          All Sizes
          - / ct
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          Calcite Value

          Accompanying value information:
          Faceted 5 to 100 carats
          to /ct
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          Celestite Value

          Accompanying value information:
          Faceted All sizes
          to /ct
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          Cerussite Value

          Accompanying value information:
          Faceted 5 carats plus
          to /ct
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          Chambersite Value

          Accompanying value information:
          Faceted .10 carats plus
          to /ct
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          Chrysoberyl Value

          Top Color: styG, YG, gY 3/4
          Faceted 1 to 7 carats
          Color Change to ,000/ct
          Fine Green to /ct.
          Bright Yellow to /ct
          Brownish Yellow to /ct
          Cat’s Eye All sizes
          /ct to /ct
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          Chrysocolla Value

          Accompanying value information:
          Sillicated All sizes
          Solid Color to /ct
          Parrot Wing /ct
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          Chrysoprase Value

          Cabochons All sizes
          to /ct
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          Cinnabar Value

          Accompanying value information:
          Cabochons All sizes
          to /ct
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          Citrine Value

          Top Color:?O 6/4
          Faceted .5 to 1 carat 1 carat plus
          Madeira to /ct
          Orange to /ct to /ct
          Yellow to to /ct
          Gold to to /ct
          Cabochons .5 to 1 carat 1 carat plus
          Yellow to Orange to /ct to /ct
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          Colored Diamonds Value

          Black Diamonds .6 - .10 carats .10 - .24 carats .25 to .33 carats .35 to .50 carats .51 to .74 carats 1 carat +
          – 120/ct - /ct - /ct - /ct - /ct - /ct
          Note: these prices are for natural black diamonds. Most black diamonds on the market are treated to color. Their value is in the tens of dollars per carat.
          Brown Diamonds .33 to .9 carats 1 to 1.5 carats
          VS2 /ct to /ct
          SI2 /ct to /ct
          I1 to /ct to /ct
          Natural Fancy Colors .1 to .99 carats 1 carat plus
          Yellow/Brown to /ct
          Yellow SI to I1 to /ct
          Yellow SI1 to VVS2 to ,000/ct to /ct
          Orange SI1 to I1 to /ct
          Irridated Fancy Colors .1 to .99 carats 1 carat plus
          Yellow SI1 to I1 to /ct to /ct
          Green SI1 to /ct to /ct
          Blue SI1 to /ct to /ct
          Pink SI1 to /ct to /ct
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          Coral Value

          Cabochons All sizes
          Red to /ct
          Deep Pink to /ct
          Light Pink to /ct
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          Crocoite Value

          Accompanying value information:
          Faceted 5 to 10 carats
          to /ct
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          Cuprite Value

          Accompanying value information:
          Faceted 4 carats plus
          to /ct
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          Danburite Value

          Accompanying value information:
          Faceted 1 carat plus
          Pink to /ct
          Colorless to /ct
          Other Colors to /ct
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          Datolite Value

          Accompanying value information:
          Faceted .5 to 1 carat 1 carat plus
          /ct to /ct
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          Diaspore Value

          Faceted 1 to 12 carats
          to /ct
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          Diopside Value

          Accompanying value information:
          Chrome Diopside 1 to 2 carats 2 carats plus
          Faceted to /ct to /ct
          Black Star All sizes
          to /ct
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          Emerald Value

          Top origins: Colombian emeralds command premium prices. Recent finds in Ethiopia may also command premium prices. Prices assume colorless clarity enhancement, (no dyes.) Average brilliancy of 40 to 60%. Add up to 20% or deduct to 10% for other cutting. Prices for emerald cuts, round, ovals and pear. Add to 10% for marquis.

          Colombian Emeralds

          Top Color:?vstbG 5/5; bG 5/5 or 6/5; vslbG 5/5
          cts VVS VS/SI SI/I
          <0.25 - - -
          0.25-0.99 - - -
          1.00-1.99 - - -
          2.00-4.99 - - -
          5.00-7.99 - - -
          8.00+ - - -
          Very Good Color: vstbG 6/5; bG 5/5, 4/5 or 6/4; vslbG 5/5, 6/5
          cts VVS VS/SI SI/I
          <0.25 - - -
          0.25-0.99 - - -
          1.00-1.99 - - -
          2.00-4.99 - - -
          5.00-7.99 - - -
          8.00+ - - -
          Good Color: vstbG 4/5, 5/4, 6/4; bG 3/5, 4/4, 5/3, 6/3, 7/4; vslbG 3/5, 4/4, 4/5, 5/3, 6/4; G 4/5, 5/4,5/5, 6/5
          cts VVS VS/SI SI/I
          <0.25 - - -
          0.25-0.99 - - -
          1.00-1.99 - - -
          2.00-4.99 - - -
          5.00-7.99 - - -
          8.00+ - - -
          Fair Color: vstbG 3/5, 4/4, 7/4; bG 3/4, 4/3, 7/3; vslbG 3/4, 6/3, 7/3, 7/4; G 3/5, 4/4, 5/3, 6/4
          cts VVS VS/SI SI/I
          <0.25 - - -
          0.25-0.99 - - -
          1.00-1.99 - - -
          2.00-4.99 - - -
          5.00-7.99 - - -
          8.00+ - - -

          Other Emeralds

          Top Color: vstbG 5/5; bG 5/5 or 6/5; vslbG 5/5
          cts VVS VS/SI SI/I
          <0.25 - - -
          0.25-0.99 - - -
          1.00-1.99 - - -
          2.00-4.99 - - -
          5.00+ - - -
          Very Good Color: vstbG 6/5; bG 5/5, 4/5 or 6/4; vslbG 5/5, 6/5
          cts VVS VS/SI SI/I
          <0.25 - - -
          0.25-0.99 - - -
          1.00-1.99 - - -
          2.00-4.99 - - -
          5.00+ - - -
          Good Color: vstbG 4/5, 5/4, 6/4; bG 3/5, 4/4, 5/3, 6/3, 7/4; vslbG 3/5, 4/4, 4/5, 5/3, 6/4; G 4/5, 5/4,5/5, 6/5
          cts VVS VS/SI SI/I
          <0.25 - - -
          0.25-0.99 - - -
          1.00-1.99 - - -
          2.00-4.99 - - -
          5.00+ - - -
          Fair Color: vstbG 3/5, 4/4, 7/4; bG 3/4, 4/3, 7/3; vslbG 3/4, 6/3, 7/3, 7/4; G 3/5, 4/4, 5/3, 6/4
          cts VVS VS/SI SI/I
          <0.25 - - -
          0.25-0.99 - - -
          1.00-1.99 - - -
          2.00-4.99 - - -
          5.00+ - - -
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          Enstatite Value

          Accompanying value information:
          Faceted All sizes
          to /ct
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          Epidote Value

          Accompanying value information:
          Faceted All sizes
          to /ct
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          Fluorite Value

          Accompanying value information:
          Faceted All sizes
          $.50 to /ct
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          Garnet Value

          Almandine

          Top Color: oR, R, PR, rP 6/4
          Almandine All sizes
          to /ct

          Almandine/Pyrope Blend ("Mozambique")

          Red-Brown Colors
          "Mozambique" All sizes
          to /ct

          Rhodolite (Almandine/Pyrope Blend)

          Fine Color: rP, PR 6/5
          Rhodolite .5 to 1 carat 1 to 10 carats 10 carats plus
          Faceted to /ct to /ct to /ct
          Cabochons to /ct to /ct to /ct

          Andradite

          Fine Color: G 5/4
          Andradite All sizes
          to /ct

          Demantoid

          Demantoid to 1 carat 1 to 3 carats
          to /ct to ,000/ct

          Grossular

          Grossular .5 to 1 carat 1 to 5 carats 5 carats plus
          Mint Green (Merelani) to /ct to /ct to /ct
          Yellow/Orange to /ct to /ct to /ct
          Yellow/Green to /ct to /ct to /ct
          Other colors /ct /ct to /ct

          Hessonite

          Fine Color: yO 4/5
          Hessonite Garnet All sizes
          to /ct

          Tsavorite

          Fine Color: G 6/5
          Tsavorite .5 to 1 carat 1 to 2 carats 2 carats plus
          Faceted to /ct to /ct to ,000/ct

          Mali Garnets (Andradite/Grossular Blend)

          Mali Garnet All sizes
          to /ct

          Malaya (Malaia) Garnets

          Malaya Garnet .5 to 1 carat 1 to 5 carats 5 carats plus
          to /ct to /ct to /ct

          Pyrope

          Fine Color: R 6/5
          Pyrope 1 carat plus
          /ct

          Chrome Pyrope

          Chrome Pyrope All sizes
          to /ct

          Spessartite

          Spessartite Reds .5 to 3 carats 3 to 6 carats
          Little 3 Mine to /ct to /ct
          African to /ct to /ct
          Darker reds to /ct

          Mandarin

          Fine Color: O 4/5
          Mandarin Orange All sizes
          to /ct

          Uvarovite

          Uvarovite 10 carats plus
          Druzy to /ct

          Star Garnet

          Star Garnet All sizes
          6 ray star to /ct
          4 ray star to /ct

          Color Change

          Color Change .5 to 1 carat 1 to 6 carats
          Africa to /ct to /ct
          US to /ct to /ct

          Cabochons

          Cabochons All Sizes
          Common red to purple to /ct
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          Gold In Quartz Value

          Accompanying value information:
          Cabochons All sizes
          to /ct.
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          Iolite Value

          Top Color: slvB 5/4
          Faceted Under 1 carat 1 to 3 carats 3 carats plus
          to /ct to /ct to /ct
          Colorless All sizes
          to /ct
          Cabochons Under 1 carat 1 carat plus
          to /ct to /ct
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          Kunzite Value

          Faceted 1 to 10 carats 10 carats plus
          to /ct to /ct
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          Lapis Lazuli Value

          Cabochons All sizes
          to /ct
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          Malachite Value

          Accompanying value information:
          Cabochons All sizes
          to /ct
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          Moissanite Value

          Faceted .5 to 1 carat over 1 carat
          Colorless to /ct to /ct
          Green to /ct to /ct
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          Moldavite Value

          Accompanying value information:
          Faceted All sizes
          to /ct
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          Moonstone Value

          Rainbow Moonstone (Peristerite) .5 to .99 carats 1 to 7 carats
          Cabochons to /ct to /ct
          Labradorite 10 to 30 carats
          Cabochons to /ct
          White, including cat's eyes All sizes
          to /ct
          White – Adularescent All sizes
          to /ct
          Other Colors All sizes
          to /ct
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          Opal Value

          Black Opal, tone N1 to N4

          Carat Weight Below commercial Commercial Good Fine Extra fine
          1 to 5 - /ct - /ct - ,400/ct ,400 - ,000/ct ,000 - ,000/ct
          5 to 10/ct - /ct - /ct - ,400/ct ,400 - ,000/ct ,000 - ,000/ct
          10 + - /ct - /ct - ,400/ct ,400 - ,400/ct ,400 - ,000/ct

          Dark Opal, tone N5 to N6

          Carat Weight Below commercial Commercial Good Fine Extra fine
          1 to 5 - /ct - /ct - ,200/ct ,200 - ,000/ct ,000 - ,000/ct
          5 to 10/ct - /ct - /ct - ,200/ct ,200 - ,000/ct ,000 - ,000/ct
          10 + - /ct - /ct - ,200/ct ,200 - ,600/ct ,600 - ,400/ct

          Light Opal, tone N7 to N9

          Body Tone Below commercial Commercial Good Fine Extra fine
          N7 - /ct - /ct - /ct - ,000/ct ,000 - ,400/ct
          N8 - /ct - /ct - /ct - /ct - ,200/ct
          N9 - /ct - - /ct - /ct - /ct

          Crystal Opal

          Carat Weight Below commercial Commercial Good Fine Extra fine
          1 to 5 - /ct - /ct - /ct - ,000/ct ,000 - ,000/ct
          5 to 10/ct - /ct - /ct - /ct - ,000/ct ,000 - ,400/ct
          10 + - /ct - /ct - /ct - ,000/ct ,000 - ,000/ct

          Boulder and Matrix Opal

          Carat Weight Below commercial Commercial Good Fine Extra fine
          1 to 5 - /ct - /ct - /ct - /ct - /ct
          5 to 10/ct - /ct - /ct - /ct - /ct - /ct
          10 to 15 - /ct - ,20/ct - /ct - /ct - /ct
          15 + - /ct - /ct - /ct - /ct - /ct

          Composite Opals

          Doublets prices are usually 15% to 35% of the value of similar looking natural, (solid,) gem. However, they occasionally run as high as 50% of a natural opal if they are of exceptional quality. Triplets are only about 1% of the value of an equivalent natural and peak at .

          Other Opal Types

          Contra Luz All sizes
          to /ct
          Fire Opals, faceted .4 to 1 carat 1 to 5 carats 5 carats plus
          to /ct to /ct to /ct
          Fire Opals, Cabochons .4 to 2 carats 2 to 10 carats
          Solid to /ct to /ct
          In Matrix to /ct
          Pink Opal All sizes
          /ct
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          Oregon Sunstone Value

          Schiller

          • Color Intensity: Light, medium, deep
          • Color Range: Clear, gold, peach, coral, orange, red, green
          • Transparency: Translucent to Opaque
          The price range is consistently between - per carat regardless of size or color.

          Clear Hues

          • Color Intensity: Light
          • Color Range: Clear, gold, peach, coral, pink, red, green, blue
          • Transparency: Transparent
          Price Per Carat Clear Peach Pink Light Blue Green
          Up to 2.5 cts
          2.5-5 cts
          5-7 cts
          7 cts

          Mid-Deep Tones

          • Color Intensity: Medium to deep
          • Color Range: Strong Peach, orange, red, green, blue
          • Transparency: Transparent
          Price Per Carat Med Red Orange Red Blue Green
          Up to 2.5 cts
          2.5-5 cts
          5-7 cts
          7 cts

          Constellation, AKA Aventurescent

          • Color Intensity: Medium to deep
          • Color Range: Strong peach, orange, red, green, blue
          • Transparency: Transparent
          Price Per Carat Mid to Deep Color Constellation
          Up to 2.5 cts
          2.5-5 cts
          5-7 cts
          7 cts

          Two Tone (Dichroic)

          • Color Intensity: Medium to deep
          • Color Range: Strong peach, orange, red, green, blue
          • Transparency: Transparent
          Price Per Carat Light Dichroic Med Dichroic Deep Dichroic
          Up to 2.5 cts
          2.5-5 cts
          5-7 cts
          7 cts

          Classic Sunstone

          • Color Intensity: Combination of light-medium or light-deep
          • Color Range: Gold, peach, coral, pink, red, green, blue
          • Transparency: Transparent
          Note: There was a limited sampling of larger sized stones, which may affect pricing accuracy.
          Price Per Carat Light Classic Pink/Peach Classic Mid to Deep Red Classic Blue/Green
          Up to 2.5 cts
          2.5-5 cts
          5-7 cts
          7 cts

          Mystique

          • Color Intensity: Light, medium, deep
          • Color Range: Gold, peach, coral, pink, red, green, blue
          • Transparency: Transparent
          Price Per Carat Med-Deep Mystique
          Up to 2.5 cts
          2.5-5 cts ,226.00
          5-7 cts
          7 cts
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          Pearls

          Prices of pearls are based on several quality factors. The values provided in this guide are for round cultured pearls. Baroque pearls are about 25-35% the cost of round pearls. Natural pearls are extremely rare, and largely limited to auction and collector’s markets. These can be worth 10 to 20 times an equivalent Akoya cultured pearl.

          Akoya Pearls with White Body Color

          Accompanying value information:

          Matching Pair

          Size (mm) Top Luster High Luster
          6 - 6.5 - -
          6.5 - 7 - -
          7 - 7.5 - -
          7.5 - 8 - -
          8 - 8.5 - -
          8.5 - 9 - -
          9 - 9.5 - -

          Single Pearl

          Size (mm) Top Luster High Luster
          6 - 6.5 - -
          6.5 - 7 - -
          7 - 7.50 - -
          7.5 - 8 - -
          8 - 8.5 - -
          8.5 - 9 - -
          9 - 9.5 - -

          Freshwater Pearls with White Body Color

          Matching Pair

          Size (mm) Top Luster High Luster
          6 - 7 - -
          7 - 8 - -
          8 - 9 - -
          9 - 10 - -
          10 - 11 - -

          Single Pearl

          Size (mm) Top Luster High Luster
          6 - 7 - -
          7 - 8 - -
          8 - 9 - -
          9 - 10 - -
          10 - 11 - -

          South Sea Pearls

          Accompanying value information:

          Matching Pair

          Size (mm) High Luster, White High Luster, Golden
          8 - 9 - -
          9 - 10 - -
          10 - 11 - -
          11 - 12 - -
          12 - 13 - -
          13 - 14 - -

          Single Pearl

          Size (mm) High Luster, White High Luster, Golden
          8 - 9 - -
          9 - 10 - -
          10 - 11 - -
          11 - 12 - -
          12 - 13 - -
          13 - 14 - -

          Tahitian Pearls with Black Body Color

          Accompanying value information:

          Matching Pair

          Size (mm) Top Luster High Luster
          8 - 9 - -
          9 - 10 - -
          10 - 11 - -
          11 - 12 - -
          12 - 13 - -

          Single Pearl

          Size (mm) Top Luster High Luster
          8 - 9 - -
          9 - 10 - -
          10 - 11 - -
          11 - 12 - -
          12 - 13 - -
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          Peridot Value

          Top Color: yG 5/4
          Faceted .5 to 1 carat 1 to 3 carats 3 carats plus
          Eye Clean to /ct to /ct to /ct
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          Phenakite Value

          Accompanying value information:
          Faceted All sizes
          to /ct
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          Quartz Value

          Smoky Quartz All sizes
          Faceted to /ct
          Rose Quartz All sizes
          Faceted to /ct
          Rutilated & Tourmalinated Quartz All sizes
          Faceted to /ct
          Cabochons /ct
          Quartz with Lepidocrite All sizes
          Faceted or cabochon to /ct
          Star Quartz All sizes
          to /ct
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          Rhodochrosite Value

          Accompanying value information:
          Faceted All sizes
          Colorado to /ct
          African to /ct
          Cabochons All sizes
          Bulls eye to /ct
          Plain to /ct
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          Ruby Value

          Burma Ruby - Unheated

          Origin and lack of treatment should be certified. Prices for oval and cushion cuts. Add up to 20% or deduct to 10% for other cutting. Add 7% to 10% for rounds, pears, marquis. Add 15% to30% for emerald cuts.
          Top Color: R 6/6
          No trade data available. As of May 2015, the record price for a ruby is approximately 2 million per carat. ( million for a 25.59 carat Mogok "pigeon's blood" ruby).
          Very Good Color: R 5/6, 7/5; slpR 5/6, 6/6, 7/5; stpR 6/6
          cts VVS VS/SI SI/I
          0.50-0.99 - /ct - /ct - /ct
          1.00-1.99 - /ct - /ct - /ct
          2.00-2.99 - /ct - /ct - /ct
          3.00-4.99 - /ct - /ct - /ct
          5.00+ - /ct - /ct - /ct
          Good Color: R 6/5; slpR 6/5; stpR 5/6
          cts VVS VS/SI SI/I
          0.50-0.99 - /ct - /ct - /ct
          1.00-1.99 - /ct - /ct - /ct
          2.00-2.99 - /ct - /ct - /ct
          3.00-4.99 - /ct - /ct - /ct
          5.00+ - /ct - /ct - /ct
          Fair Color: R 5/5, 6/4, 7/4; slpR 5/5, 6/4, 7/4
          cts VVS VS/SI SI/I
          0.50-0.99 - /ct - /ct - /ct
          1.00-1.99 - /ct - /ct - /ct
          2.00-2.99 - /ct - /ct - /ct
          3.00-4.99 - /ct - /ct - /ct
          5.00+ - /ct - /ct - /ct

          Ruby - Heat Treated

          Prices for oval and cushion cuts. Add up to 20% or deduct to 10% for other cutting. Add 7% to 10% for rounds, pears, marquis. Add 15% to30% for emerald cuts.
          Top Color: R 6/6
          No trade data available.
          Very Good Color: R 5/6, 7/5; slpR 5/6, 6/6, 7/5; stpR 6/6
          cts VVS VS/SI SI/I
          0.50-0.99 - /ct - /ct - /ct
          1.00-1.99 - /ct - /ct - /ct
          2.00-2.99 - /ct - /ct - /ct
          3.00-4.99 - /ct - /ct - /ct
          5.00+ - /ct - /ct - /ct
          Good Color: R 6/5; slpR 6/5; stpR 5/6
          cts VVS VS/SI SI/I
          0.50-0.99 - /ct - /ct - /ct
          1.00-1.99 - /ct - /ct - /ct
          2.00-2.99 - /ct - /ct - /ct
          3.00-4.99 - /ct - /ct - /ct
          5.00+ - /ct - /ct - /ct
          Fair Color: R 5/5, 6/4, 7/4; slpR 5/5, 6/4, 7/4
          cts VVS VS/SI SI/I
          0.50-0.99 - /ct - /ct - /ct
          1.00-1.99 - /ct - /ct - /ct
          2.00-2.99 - /ct - /ct - /ct
          3.00-4.99 - /ct - /ct - /ct
          5.00+ - /ct - /ct - /ct

          Additional Ruby Shapes and Types

          Cabochons .5 to 1 carat over 3 carats
          to /ct to /ct
          Star Ruby .5 to 1 carat Over 1 carat
          Near top color to /ct to /ct
          Indian Rubies All sizes
          to .ct
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          Sapphire Value

          Kashmir Sapphire

          Certified origin. Untreated material. Average brilliancy of 40 to 60%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 8% to 10% for rounds and pears. Add 10% to 20% for emeralds and marquis.
          Top Grade: vB 5/6, 6/6. B 5/6, 6/6.
          Top Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
          VVS ,000 to ,650/ct ,000 to ,000/ct ,000 to ,500/ct to ,000/ct
          VS/SI ,000 to ,000/ct ,000 to ,700/ct ,000 to ,000/ct to ,000/ct
          SI/I ,000 to ,000/ct ,000 to 24,600/ct ,000 to 27,600/ct to ,000/ct
          Very Good Grade: V 4/6, 5/6, 6/5. bV 5/6, 6/6; vB 5/5, 4/6, 6/5.
          Very Good Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
          VVS ,000 to ,300/ct ,600 to ,400/ct ,000 to ,000/ct to ,000/ct
          VS/SI to ,100/ct ,000 to ,700/ct ,000 to ,000/ct to ,500/ct
          SI/I to ,300/ct ,000 to ,000/ct ,400 to ,600/ct to ,500/ct
          Good Grade: V 4/5, 5/4, 5/5, 6/4, 6/5, 7/5; bV 4/5, 4/6, 5/4, 5/5, 5/4, 4/5; vB 3/5, 4/4, 6/3, 7/5, 5/4, 4/5; B 3/5, 4/4, 6/3, 7/5, 6/4, 5/4, 4/5.
          Good Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
          VVS to ,200/ct to ,700/ct ,000 to ,000/ct to ,000/ct
          VS/SI to /ct to ,200/ct ,000 to ,000/ct to ,000/ct
          SI/I to /ct to ,500/ct ,000 to ,000/ct to ,900/ct
          Fair Grade: V 3/4, 3/5, 4/4, 4/3, 5/3, 6/3, 7/4; bV 3/5, 4/4, 5/3, 6/3, 7/4, 7/5; vB 3/4, 4/3, 7/4, 6/2, 5/3; B 3/4, 4/3, 7/4 6/2, 5/2, 5/3.
          Fair Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
          VVS to /ct to ,200/ct to ,500/ct to ,500/ct
          VS/SI to /ct to /ct to ,000/ct to ,000/ct
          SI/I to /ct to /ct to ,500/ct to ,700/ct

          Other Blue Sapphires

          Heat treated material. Average brilliancy of 40% to 60%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 8% to 10% for rounds and pears. Add 10% to 20% for emeralds and marquis. Note: If certified Burmese and untreated, add 50%, except fair or lower grades. Typically, mid-quality untreated blue sapphire will sell for 20-30% more than a treated stone of the same quality. Top-quality unheated stones could get a premium of 50% or higher, especially if they're large.
          Top Grade: vB 5/6, 6/6; B 5/6, 6/6.
          Top Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
          VVS to /ct to /ct to /ct to ,500/ct
          VS/SI to /ct to /ct to /ct /ct
          SI/I to /ct to /ct to /ct /ct
          Very Good Grade: V 4/6, 5/5, 6/6; bV 5/6, 6/7; vB 5/5, 4/6, 6/5; B 4/6, 5/5, 6/5; vslgB 4/6, 5/6, 6/6.
          Very Good Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
          VVS to /ct to /ct to /ct to /ct
          VS/SI to /ct to /ct to /ct to /ct
          SI/I to /ct to /ct to /ct to /ct
          Good Grade: V 4/5, 5/4, 5/5, 6/4, 6/5, 7/5; bV 4/5, 4/6, 5/4, 5/5, 6/4, 6/5; vB 3/5, 4/4, 6/3, 7/5, 5/4, 4/5; B 3/5, 4/4, 6/3, 7/5, 6/4, 6/4, 5/4, 4/5; vslgB 7/5, 5/4, 6/4, 4/5, 6/5, 5/5; gB 4/5, 5/5, 6/5.
          Good Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
          VVS to /ct to /ct to /ct to /ct
          VS/SI to /ct to /ct to /ct to /ct
          SI/I to /ct to /ct to /ct to /ct
          Fair Grade: V 3/4, 3/5, 4/3, 4/4, 5/3, 6/3, 7/4; bV 3/5, 4/4, 5/3, 6/3, 7/4, 7/5; vB 3/4, 4/3, 6/2, 7/4, 5/3; B 3/4, 4/3, 7/4, 6/2, 5/2, 5/3; vslgB 3/4, 3/5, 4/3, 4/4, 5/3, 6/3, 7/4; gB 3/5, 4/4, 5/3, 5/4, 6/3, 6/4, 7/4; vstgB 4/4, 5/4, 6/4.
          Fair Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
          VVS to /ct to /ct to /ct to /ct
          VS/SI to /ct to /ct to /ct to /ct
          SI/I to /ct to /ct to /ct to /ct

          Fancy Sapphires

          Average brilliancy of 30% to 40%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 7% to 10% for rounds, pears and marquis. Add 15% to 30% for emerald cuts.

          Pink Sapphire

          Top Color: stpR 3/6, 4/6; RP 4/6; rP 4/6
          No trade data available
          Very Good Color: slpR 4/6; stpR 4/5; RP 3/5, 4/4, 4/5; rP 3/5, 4/4, 4/5; P 4/5.
          Very Good Color .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
          VVS to /ct to /ct to /ct to ,500/ct
          VS/SI to /ct to /ct to /ct to /ct
          SI/I to /ct to /ct to /ct to /ct
          Good Color: slpR 3/5, 4/4, 4/5; stpR 3/4, 3/5, 4/4; RP 3/4, 4/3; rP 3/4, 4/3; P 3/4, 4/4.
          Good Color .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
          VVS to /ct to /ct to /ct to /ct
          VS/SI to /ct to /ct to /ct to /ct
          SI/I to /ct to /ct to /ct to /ct
          Fair Color: slpR 3/3, 4/3; stpR 3/4, 4/3; RP 2/3, 3/3; rP 2/3, 3/3; P 3/, 4/3.
          Fair Color .75 to 1 carat 1 to 2 carats 2 carats plus
          VVS to /ct to /ct to /ct
          VS/SI to /ct to /ct to /ct
          SI/I to /ct to /ct to /ct

          Yellow Sapphire

          Top Color: Y 3/5; oY 3/5. Very Good Color: Y 3/4; oY 3/4. Good Color: Y 3/3, 4/4; oY 3/3, 4/4. Fair Color: Y 2/3, 4/3; oY 2/3, 4/3.
          Yellow Sapphire to 2 carats 2 carats plus
          Top Color to /ct to /ct
          Very Good Color to /ct to /ct
          Good Color to /ct to /ct
          Fair Color to /ct to /ct

          Green Sapphire

          Top Color: vslbG 6/3, bG 6/3, G 6/3. Very Good Color: BG 6/3, vstbG 6/2, 5/3, 6/2; bG 4/3, 5/3, 6/3; vslbG 4/3, 5/3, 6/2; G 5/3, 7/3; slyG 5/3, 6/3; yG 6/3. Good Color: BG 4/3, 5/3, 6/2; vstbG 4/3, 5/3, 7/3; bG 4/2, 5/2, 7/3, G 5/2,6/2; slyG 5/2, 6/2, 7/3; yG 5/3, 6/2, 7/3; styG 5/3, 6/3; styG 5/3, 6/3. Fair Color: BG 4/2, 5/2; vstbG 4/2, 7/2; bG 3/2, 7/2; vslbG 7/2; G 4/2, 7/2; slyG 4/2, 7/2; yG 5/2, 7/3; styG 5/2, 6/2.
          Green Sapphire to 1 carat 1 carat plus
          Top Color to /ct to /ct
          Very Good Color to /ct to /ct
          Good Color to /ct to /ct
          Fair Color to /ct to /ct

          Purple Sapphire

          Top Color: RP 6/6, 5/6; rP 6/6; P 6/6. Very Good Color: stpR 5/5, 6/5; RP 5/5, 6/5, 7/5; rP 5/6, 6/5; P 5/6, 6/5; bP 5/6, 6/5. Good Color: slpR 5/3, 6/3; stpR 5/4, 6/4, 7/4; RP 5/4, 6/3, 6/4, 7/4; rP 5/4, 5/5, 6/4, 7/5; P 5/4, 5/5, 6/4, 7/5; bP 4/5, 4/6, 5/5. Fair Color: .
          Purple Sapphire to 2 carats 2 carats plus
          Top Color to /ct to /ct
          Very Good Color to /ct to /ct
          Good Color to /ct to /ct
          Fair Color to /ct to /ct

          Other Sapphires

          White Sapphire .5 to 3 carats 3 to 5 carats 5 to 15 carats
          to /ct to /ct to /ct
          Color Change Sapphire .5 to 1 carat 1 to 7 carats
          to /ct to /ct
          Blue Cabochons .5 to 1 carat 1 to 7 carats
          to /ct to /ct
          Star Sapphire .5 to 1 carat 1 to 5 carats
          Blue to /ct to /ct
          Fancy Colors to /ct to /ct
          Black to /ct to /ct
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          Sapphirine Value

          Accompanying value information:
          Faceted .5 to 1 carat 1 to 5 carats
          to /ct to /ct
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          Scapolite Value

          Accompanying value information:
          Gold 1 to 3 carats 3 carats plus
          Faceted to /ct to /ct
          Purple .5 to 1 carat 1 carat plus
          Faceted to /ct to /ct
          Colorless 1 to 10 carats 10 carats plus
          Faceted to /ct to /ct
          Cat’s Eye 1 to 10 carats
          to /ct
          Star 1 carat plus
          to /ct
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          Sphalerite Value

          Faceted 1 carat plus
          to /ct
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          Spinel Value

          Fine Color Blue: B 5/5
          Blue .5 to 2 carats 2 to 4 carats 4 carats plus
          Faceted to /ct to /ct to /ct
          Fine Color Red: R, slpR 5/5
          Red .2 to 1 carat 1 to 5 carats
          Faceted to /ct to ,000/ct
          Pink .5 to 1 carats 1 to 3 carats 3 carats plus
          Faceted to /ct to ,000/ct to
          Fine Color Purple: P 5/5: P, rP, bP, V 5/4
          Purple .5 to 1 carats 1 to 3 carats 3 carats plus
          Faceted to /ct to ,800/ct to ,000/ct
          Fine Color Orange: O, rO 5/5
          Other Colors .5 to 1 carats 1 to 5 carats 5 carats plus
          Faceted to /ct to /ct to ,000/ct
          Star Spinel All sizes
          to /ct
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          Sugilite Value

          Accompanying value information:
          Faceted All sizes
          to /ct
          Cabochons All sizes
          to /ct
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          Sunstone Value

          Accompanying value information:
          Red, Green & Bicolored .10 to .99 carats 1 to 100 carats
          SI to clean to /ct to /ct
          Peach .5 to 20 carats
          SI to clean to /ct.
          Schiller 1 carat plus
          SI to clean to /ct
          Yellow 1 carat plus
          SI to clean to /ct
          Cabochons All sizes
          Red to /ct
          Schiller to /ct
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          Tanzanite Value

          Top Color: vB 6/5
          Faceted .5 to 1 carat 1 to 3 carats 5 carats plus
          SI to Clean to /ct to /ct to /ct
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          Titanite Value

          Faceted .5 to 1 carats 1 to 10 carats 10 to 20 carats
          to /ct to /ct to /ct
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          Topaz Value

          Top Color: oR, R 5/5
          Imperial .5 to 1 carat 1 to 3 carats 3 carats plus
          - /ct to /ct to /ct
          Pink .5 to 3 carat 3 carats plus
          to /ct to /ct
          Top Color: vslgB, gB 5/5
          Blues & Colorless .5 to 1 carat 1 carat plus
          London Blue to to /ct
          Swiss Blue to /ct to /ct
          Sky Blue to /ct to /ct
          Colorless to /ct to /ct
          Other Colors All sizes
          Faceted to /ct
          Cabochons All sizes
          Blue to /ct
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          Tourmaline Value

          Brazilian Cuprian (Paraíba) Tourmaline

          Carat Weight Low Average Good Great Superb
          0.20-0.99 -,000 / ct ,000-,000?/ ct ,850-,000?/ ct ,000-,000?/ ct ,000-,500?/ ct
          1.00-1.99 -,000 / ct ,000-,500?/ ct ,000-,000?/ ct ,000-,000?/ ct ,000-,000?/ ct
          2.00-2.99 -,000 / ct ,500-,500?/ ct ,000-,000?/ ct ,000-,000?/ ct ,000+?/ ct
          3.00-4.99 ,100-,500 / ct ,000-,000?/ ct ,000-,000?/ ct ,000-,000?/ ct ,000+?/ ct
          5.00+ ,000+?/ ct ,000+?/ ct ,000+?/ ct ,000+?/ ct ,000+?/ ct

          African Cuprian (Paraíba) Tourmaline

          Carat Weight Low Average Good Great Superb
          0.20-0.99 -,000?/ ct -,700?/ ct ,700-,500?/ ct ,000-,000?/ ct ,000-,500?/ ct
          1.00-2.99 -,450 / ct ,400-,500 / ct ,900-,000?/ ct ,500-,000?/ ct ,000-,000?/ ct
          3.00-4.99 -,800?/ ct ,550-,000?/ ct ,000-,500?/ ct ,000-,000?/ ct ,000-,000?/ ct
          5.00-9.99 -,500?/ ct ,000-,500?/ ct ,500-,000?/ ct ,000-,500?/ ct ,000-,000?/ ct
          10.00+ -,000?/ ct ,000-,500?/ ct ,500-,000?/ ct ,500-,500?/ ct ,000-,000?/ ct

          Fine Color Blue: B 5/4

          Indicolite .4 to 2 carats 2 to 10 plus carats
          Faceted to /ct to /ct
          Cabochons to /ct

          Fine Color Red: R, slpR 6/5

          Rubellite .5 to 1 carat 1 to 5 carats 5 carats plus
          Reds to /ct to /ct to /ct
          Pinks to /ct to /ct to /ct

          Fine Color Green: vstbG, BG, vslbG 5/4

          Chrome .5 to 1 carat 1 to 5 carats
          to /ct to /ct
          Other greens .5 to 2 carats 2 to 5 carats 5 carats plus
          to /ct to /ct to /ct

          Other Tourmaline Types

          Other Faceted Tourmaline .5 to 1 carat 1 to 5 carats 5 plus carats
          Fancy Colors: - Yellow - Orange (Top Color Orange: O 4/5) - Purple to /ct to /ct to /ct
          Watermelon to to /ct to /ct
          Other Multicolor to to /ct to /ct
          Cat’s Eye .5 to 1 carat 1 to 5 carats 5 plus carats
          to /ct to /ct to /ct
          Other Cabochons 1 to 5 carats 5 plus carats
          All colors to /ct to /ct
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          Turquoise Value

          Cabochons All Sizes
          to /ct
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          Wulfenite Value

          Accompanying value information:
          Faceted .5 to 1.5 carat
          to /ct
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          Zircon Value

          Fine Color Red: oR 5/4
          Red 1 to 5 carats
          to /ct
          Fine Color Blue: vstgB 5/4
          Blue 1 to 5 carats 5 carats plus
          to /ct to /ct
          Fine Color Green: slyG 5/3
          Green 1 to 5 carats 5 carats plus
          to /ct to /ct
          Fine Color Yellow to Orange: rO 4/4
          Yellow to Orange .5 to 1 carat 1 to 20 carats
          Sold as "Gold" /ct to /ct
          Other Colors 1 carat plus
          to /ct
          Cat’s Eye All sizes
          Blue /ct
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