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Buy 12 Carat Gems

(1004)
Gem Type Weight Size Clarity Price Origin
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Medium Red Strawberry Quartz Gem - 12.4ct Oval Facet (ID: 472446)

Oval Red Strawberry Quartz

12.4ct
17.7 x 13.6 mm
$ 87.08
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Baby Blue Aquamarine Gem - 11.9ct Octagon / Scissor Cut (ID: 450371)

Octagon / Emerald Cut Blue Aquamarine

11.9ct
17.4 x 10 mm
$ 2,967.50
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Blue-Green Cat's Eye Aquamarine Gem - 11.8ct Oval Cabochon (ID: 326838)

Oval Green Cat's Eye Aquamarine

11.8ct
16 x 10.9 mm
$ 213.12
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Light Yellow Star Moonstone Gem - 12.5ct Oval Cabochon (ID: 484388)

Oval Yellow Star Moonstone

12.5ct
15.3 x 13.2 mm
$ 50.04
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Multicolor Ruby in Fuchsite Gem - 12ct Marquise Slice (ID: 384798)

Marquise Multicolor Ruby in Fuchsite

12ct
28.6 x 15.5 mm
$ 82.10
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Multicolor Ammolite Gem - 12.2ct Fancy Cabochon (ID: 520802)

Fancy Multicolor Ammolite

12.2ct
17.8 x 13.9 mm
$ 243.80
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Rose Pink Strawberry Quartz Gem - 12.9ct Pear Facet (ID: 473005)

Pear Pink Strawberry Quartz

12.9ct
18.9 x 13.2 mm
$ 87.59
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Light Cyan Blue Topaz Gem - 11.6ct Fantasy Carved Leaf (ID: 479801)

Flower Cut Blue Topaz

11.6ct
18.7 x 13.1 mm
$ 58.00
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Purplish Blue Chalcedony Gem - 12.7ct Cushion Buff-Top (ID: 531575)

Cushion Blue Chalcedony

12.7ct
15.1 x 15.1 mm
$ 9.66
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Pale Green Cat's Eye Aquamarine Gem - 12.6ct Oval Cabochon (ID: 380255)

Oval Green Cat's Eye Aquamarine

12.6ct
16.5 x 13.2 mm
$ 203.97
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Dark Grey Pearl Gem - 13ct Spherical (ID: 338171)

Sphere / Ball Gray Pearl

13ct
12.1 mm
$ 129.70
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Earthy Green Maw-Sit-Sit Gem - 11.6ct Round Cabochon (ID: 407802)

Round Green Maw-Sit-Sit

11.6ct
13.2 mm
$ 23.20
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Multicolor Opal Gem - 11.9ct Oval Cabochon (ID: 462139)

Oval Multicolor Opal

11.9ct
17.7 x 13.7 mm
$ 478.69
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Multicolor Boulder Opal Gem - 12.3ct Fancy Cabochon (ID: 522180)

Fancy Multicolor Boulder Opal

12.3ct
22.9 x 14.2 mm
$ 61.50
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Dark Gray Pearl Gem - 11.8ct Baroque (ID: 333579)

Fancy Gray Pearl

11.8ct
13.1 mm
$ 129.50
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Deep Blue Color-Change Fluorite Gem - 12.3ct Round Facet (ID: 413680)

Round Blue Color-Change Fluorite

12.3ct
14.1 mm
$ 306.25
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Very Light Green Cat's Eye Aquamarine Gem - 11.7ct Oval Cabochon (ID: 356449)

Oval Green Cat's Eye Aquamarine

11.7ct
16.5 x 12.7 mm
$ 198.05
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Light Orange Red Carnelian Gem - 11.8ct Cushion Checkerboard (ID: 513441)

Cushion Red Carnelian

11.8ct
15 x 15 mm
$ 47.04
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Light Blue Topaz Gem - 11.6ct Pear Concave Fantasy Cut (ID: 486263)

Pear Blue Topaz

11.6ct
17.9 x 11.9 mm
$ 103.95
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Multicolor Labradorite Gem - 12.1ct Oval Facet (ID: 473111)

Oval Multicolor Labradorite

12.1ct
18.3 x 12.9 mm
$ 24.12
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Mint Green Chrysoprase Gem - 12.1ct Pear Cabochon (ID: 510621)

Pear Green Chrysoprase

12.1ct
20.3 x 13.2 mm
$ 23.76
Item in Stock
12 Carat Gems
Buy gems by weight. Select the best 12 carat gems from a wide array of colored stones, including rare gem types such as scapolite, black opal and pietersite. Also available are beautiful and popular faceted gems, including tanzanite, zircon and tourmaline. Large 12-carat gems make perfect statement stones, whether they are worn as a necklace pendant, ring or another jewelry design. Browse the largest selection of natural loose colored gemstones available in 12 carats. From here, you can use our filters at the top or on the left-hand side to find gems by gem type, color, shape, cut and so on. For example, select 'jadeite' to see all of our 12-carat jadeite gems. Select 'green' to shop for 12-carat green gems. You can also filter by single, pairs, lots, faceted gems or cabochons by using the check boxes at the top.
Certified Customer Reviews
Overall Rating -> 10 star ratings
Nice inventory, decent pricing. Site is easy to navigate.
Posted By Bob in December, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I love GemSelect! Every stone that I ever purchased has been carefully packaged, and sometimes comes with origin info. The stone I just ordered is for my engagement ring, because my Fiance is making my ring! I am so amazed with the selection that this site has, and I am so impressed with the prices.
Posted By KittyKat in December, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Site layout was great. Item description was good but this is first purchase so I will have to wait and see how satisfied I am with product. But this step of process was great!
Posted By Leell in December, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
i saw a program on the science channel about varieties of fluorite - a special on John 'something' from perhaps wales and varieties of colors... and i was chatting w/ friend who sent me link to your site
Posted By DrLaura in December, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Well I was looking for the perfect stone to set in a ring for my partner. I found this Garnet on a website called Gemselect and it captured my eye. I had to have it for her. It looked as perfect as she does. I got the stone I wanted for $150 shipped straight to me. It’ll be the perfect Christmas present
Posted By Willy Wonka in December, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Always enjoy browsing the website. It's super easy to use and very informative. Second order I have placed and will buy again in the future.
Posted By Negem in December, 2019
Source: Bizrate
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More Shapes
  • Asscher Cut
  • Baguette / Scissor Cut
  • Baguette Cabochon
  • Baguette Checkerboard
  • Baguette Crystal Cluster
  • Baguette Facet
  • Baguette Rose-Cut
  • Baguette Step Cut
  • Baguette Sugarloaf Cabochon
  • Baroque
  • Barrel
  • Barrel / Checkerboard
  • Barrel / Full-Round
  • Barrel / Scissor Cut
  • Barrel Cabochon
  • Barrel Rose Cut
  • Bear Carving with Hole
  • Bird Carving
  • Briolette with Hole
  • Carved Baguette
  • Carved Cameo
  • Carved Cushion
  • Carved Elephant
  • Carved Fancy
  • Carved Fish
  • Carved Fish with Hole
  • Carved Flower
  • Carved Fruit
  • Carved Half Heart
  • Carved Half Moon
  • Carved Heart
  • Carved Heart Cabochon
  • Carved Leaf
  • Carved Marquise
  • Carved Marquise Cabochon
  • Carved Octagon
  • Carved Oval
  • Carved Oval Cabochon
  • Carved Owl
  • Carved Pear
  • Carved Pear Cabochon
  • Carved Rhomb
  • Carved Rose
  • Carved Rose with Half Drilled Hole
  • Carved Round
  • Carved Round Cabochon
  • Carved Sheep
  • Carved Shell
  • Carved Square
  • Carved Teardrop
  • Carved Trillion
  • Carved Turtle
  • Cushion Buff-Top
  • Cushion Cabochon
  • Cushion Carved Medusa Cameo
  • Cushion Checkerboard
  • Cushion Checkerboard (double sided)
  • Cushion Concave Cut
  • Cushion Concave Fantasy Cut
  • Cushion Crystal Cluster
  • Cushion Mixed Cut
  • Cushion Rose-Cut
  • Cushion Shape Sugarloaf Cabochon
  • Cushion Sugarloaf Cabochon
  • Cushion-Cut
  • Diamond-Cut
  • Drilled Faceted Sphere
  • Drilled Sphere
  • Drilled Square Rondelle Slice
  • Drop / Pear
  • Fancy Cabochon
  • Fancy Carved Cushion
  • Fancy Carved Oval
  • Fancy Carved Pear
  • Fancy Carved Round
  • Fancy Carved Trillion
  • Fancy Carving
  • Fancy Crystal Cluster
  • Fancy Facet
  • Fancy Fantasy Carved Leaf
  • Fancy Fantasy Carving
  • Fancy Slice
  • Fancy Star Facet
  • Fancy-Cut
  • Fantasy Carved Flower
  • Fantasy Carved Flower Cut
  • Fantasy Carved Leaf
  • Flower Carving
  • Flower-Cut
  • Half Heart Cabochon
  • Half Heart Facet
  • Half Moon Cabochon
  • Half Moon Facet-Cut
  • Half Moon Faceted
  • Half-Drilled Briolette
  • Half-Drilled Sphere
  • Heart Cabochon
  • Heart Checkerboard (double sided)
  • Heart Facet
  • Heart Rose-Cut
  • Hexagon Cut
  • Marquise Buff-Top
  • Marquise Cabochon
  • Marquise Checkerboard
  • Marquise Checkerboard (double sided)
  • Marquise Facet
  • Marquise Mixed Cut
  • Marquise Slice
  • Marquise Sugarloaf Cabochon
  • Octagon / Scissor Cut
  • Octagon Cabochon
  • Octagon Checkerboard
  • Octagon Facet
  • Octagon Step Cut
  • Oval Buff-Top
  • Oval Cabochon
  • Oval Cabochon with Hole
  • Oval Carved Cameo
  • Oval Checkerboard
  • Oval Checkerboard (double sided)
  • Oval Concave Cut
  • Oval Crystal Cluster
  • Oval Diamond-Cut
  • Oval Facet
  • Oval Fancy Facet
  • Oval Fantasy Concave Cut
  • Oval Mixed Cut
  • Oval Portuguese-Cut
  • Oval Rose-Cut
  • Oval Slice
  • Pear Cabochon
  • Pear Checkerboard
  • Pear Checkerboard with Hole
  • Pear Concave Cut
  • Pear Concave Fantasy Cut
  • Pear Crystal Cluster
  • Pear Double-Sided Checkerboard
  • Pear Facet
  • Pear Shape Sugarloaf Cabochon
  • Pear Slice
  • Pencil
  • Pencil Cut
  • Pentagon Facet
  • Princess-Cut
  • Rhomb Cabochon
  • Rhomb Checkerboard
  • Rhomb Checkerboard (Double-Sided)
  • Rhomb Facet
  • Rondelle
  • Round Buff-Top
  • Round Cabochon
  • Round Carved Cameo
  • Round Checkerboard
  • Round Checkerboard (double sided)
  • Round Concave Cut
  • Round Concave Fantasy Cut
  • Round Drilled Checkerboard (Double Sided)
  • Round Drilled Rondelle
  • Round Facet
  • Round Mixed Cut
  • Round Mixed-Cut
  • Round Petal Cut
  • Round Portuguese-Cut
  • Round Rose-Cut
  • Round Rose-Cut (double sided)
  • Round Slice
  • Shark Fin Cabochon
  • Shield Cabochon
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  • Spherical
  • Square / Scissor Cut
  • Square Cabochon
  • Square Facet
  • Square Rose-Cut
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  • Square with Hole
  • Tapered Baguette
  • Tapered Baguette Cabochon
  • Teardrop Cabochon
  • Trapezoid
  • Trapezoid Cabochon
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  • Triangle
  • Triangle Cabochon
  • Trillion Cabochon
  • Trillion Checkerboard
  • Trillion Concave Cut
  • Trillion Concave Fantasy Cut
  • Trillion Crystal Cluster
  • Trillion Facet
  • Trillion Rose-Cut
  • Trillion Shape Sugarloaf Cabochon
  • Undrilled Briolette Teardrop
Popular Gemstones
  • Sapphire
  • Emerald
  • Ruby
  • Aquamarine
  • Zircon
  • Opal
  • Topaz
  • Tourmaline
  • Garnet
  • Amethyst
  • Citrine
  • Tanzanite
All Gemstones (144)
A B C D E F G H I J K L M N O P Q R S T V Z
  • Actinolite Cat's Eye
  • Agate
  • Agate Geode
  • Almandine Garnet
  • Amazonite
  • Amethyst
  • Ametrine
  • Ammolite
  • Andalusite
  • Andesine Labradorite
  • Apatite
  • Aquamarine
  • Aventurine
  • Beryl
  • Black Opal
  • Bloodstone
  • Boulder Opal
  • Calcite
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  • Cat's Eye Gemstones
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  • Chocolate Opal
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  • Chrysocolla
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  • Color-Change Garnet
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  • Demantoid Garnet
  • Dendritic Agate
  • Diamond
  • Druzy Amethyst
  • Druzy Azurite
  • Emerald
  • Enstatite
  • Fire Agate
  • Fire Opal
  • Fluorite
  • Fossil Coral
  • Garnet
  • Golden Beryl
  • Grandidierite
  • Grossularite Garnet
  • Hawk's Eye
  • Hematite
  • Hemimorphite Druzy
  • Hessonite Garnet
  • Hiddenite
  • Howlite
  • Idocrase
  • Imperial Topaz
  • Iolite
  • Jade Gemstones
  • Jadeite
  • Jasper
  • Kornerupine
  • Kunzite
  • Kyanite
  • Labradorite
  • Lapis Lazuli
  • Larimar
  • Malachite
  • Malaya Garnet
  • Mali Garnet
  • Maw-Sit-Sit
  • Moonstone
  • Morganite
  • Moss Opal
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  • Mystic Quartz
  • Mystic Topaz
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  • Obsidian
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  • Opal Doublet
  • Opal in Matrix
  • Pearl
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  • Pietersite
  • Prehnite
  • Pyrite
  • Pyrope Garnet
  • Quartz
  • Quartz Cat's Eye
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  • Rainbow Moonstone
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  • Sapphire
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  • Sillimanite
  • Sillimanite Cat's Eye
  • Smithsonite
  • Smoky Quartz
  • Snowflake Obsidian
  • Sodalite
  • Spectrolite
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  • Sphalerite
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  • Star Lemon Quartz
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart