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Buy 12 Carat Gems

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Gemtype Color Shape Weight Size Clarity Price Origin
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Multicolor Ammolite Gem - 11.9ct Fancy Cabochon (ID: 520785)

Fancy Multicolor Ammolite

11.9ct
20 x 11.7 mm
$ 237.60
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Silver Pearl Gem - 13ct Spherical (ID: 338171)

Sphere / Ball Gray Pearl

13ct
12.1 mm
$ 129.70
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Swiss Blue Topaz Gem - 12.8ct Pear Concave Fantasy Cut (ID: 486145)

Pear Blue Topaz

12.8ct
15.9 x 11.9 mm
$ 115.11
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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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Light 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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Multicolor Spectrolite Gem - 11.7ct Trillion Cabochon (ID: 512205)

Trillion Multicolor Spectrolite

11.7ct
24.2 x 21.3 mm
$ 38.26
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Red Strawberry Quartz Gem - 12.9ct Pear Facet (ID: 473005)

Pear Red Strawberry Quartz

12.9ct
18.9 x 13.2 mm
$ 87.59
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Multicolor Ammolite Gem - 11.6ct Fancy Cabochon (ID: 377514)

Fancy Multicolor Ammolite

11.6ct
18.5 x 14.3 mm
$ 115.70
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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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Swiss 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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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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Multicolor Opal Gem - 12.6ct Pear Cabochon (ID: 462216)

Pear Multicolor Opal

12.6ct
18.7 x 13.4 mm
$ 507.68
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Silver Pearl Gem - 11.8ct Baroque (ID: 333579)

Fancy Gray Pearl

11.8ct
13.1 mm
$ 129.50
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Violet Blue Tanzanite Gem - 12ct Cushion-Cut (ID: 378197)

Cushion Blue Tanzanite

12ct
13.1 x 12.8 mm
$ 6,123.75
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Bi-Color Ruby in Fuchsite Gem - 12ct Marquise Slice (ID: 384798)

Marquise Bi-color Ruby in Fuchsite

12ct
28.6 x 15.5 mm
$ 82.10
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Lemon Quartz Gem - 12.2ct Fantasy Carved Flower (ID: 493915)

Flower Cut Yellow Quartz

12.2ct
14.7 x 14.6 mm
$ 61.15
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Green Tsavorite Garnet Gem - 12.9ct Marquise Cabochon (ID: 521019)

Marquise Green Tsavorite Garnet

12.9ct
25 x 11.7 mm
$ 258.40
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White Opal Gem - 11.9ct Oval Cabochon (ID: 462139)

Oval White Opal

11.9ct
17.7 x 13.7 mm
$ 478.69
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Cream Star Moonstone Gem - 12.5ct Oval Cabochon (ID: 484388)

Oval Cream Star Moonstone

12.5ct
15.3 x 13.2 mm
$ 50.04
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Multicolor Spectrolite Gem - 12.9ct Shark Fin Cabochon (ID: 482538)

Fancy Multicolor Spectrolite

12.9ct
27.3 x 17.5 mm
$ 25.37
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Pink Kunzite Gem - 11.8ct Oval Facet (ID: 409222)

Oval Pink Kunzite

11.8ct
17.6 x 10.9 mm
$ 236.40
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
man their gems are pretty good, and the prices aren't to bad either, I like checking out hte gems on there website, beceause the pictures of the gems are taken pretty well, and you can see the table, and the facets.
Posted By Spinach in March, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I love gemselect and I have bought a fair amount from them. The only complaint I have is not being able to save gems. I have a lot of projects so i am in the market for a lot of different gems and it's so disappointing to have to delete them all just to purchase one or two that I have saved in my cart.
Posted By S.Hicks in March, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I always check this site because they have unique options.
Posted By Lisa in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great website to navigate. Awesome Gem selection! Nice photos and discriptions for all of the gems for sale. You can find gems in all price ranges. Checkout was a breeze.
Posted By Timmy in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
They had an extensive gemstone selection in all different cuts, sizes, and colors. They also had very good and workable prices. All of these aspects pulled me in as a customer.
Posted By Josh in February, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
It all depend on the product I will receive and have it verified by my in law jewellers.
Posted By Vodka in February, 2019
Source: Bizrate
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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