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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (885): 12 Carat Gems Clear All
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11.9ct Drilled Sphere Colorless Golden Rutile Quartz Gem (ID: 435058)
11.90 ct (total 23.79ctw) Rutile Quartz
12 mm
$ 23.79
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1 pc
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12ct Cushion-Cut Violet Blue Tanzanite Gem (ID: 378197)
12.03 ct Tanzanite
13.1 x 12.8 mm
$ 6,123.75
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12.3ct Oval Facet Golden Green Tourmaline Gem (ID: 416463)
12.25 ct Tourmaline
15.7 x 12.8 mm
$ 2,450.00
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13ct Drilled Sphere Multicolor Jasper Gem (ID: 361815)
12.97 ct (total 25.94ctw) Jasper
12.3 mm
$ 25.94
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12.6ct Drilled Sphere Colorless with Black Rutile Quartz Gem (ID: 470005)
12.60 ct (total 25.19ctw) Rutile Quartz
12.2 mm
$ 26.45
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11.9ct Baguette / Scissor Cut Light Blue Aquamarine Gem (ID: 450372)
11.89 ct Aquamarine
16.8 x 9.9 mm
$ 2,972.50
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12ct Marquise Slice Bi-Color Ruby in Fuchsite Gem (ID: 384798)
12.02 ct Ruby in Fuchsite
28.6 x 15.5 mm
$ 82.10
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12.9ct Fancy Cabochon Multicolor Fire Agate Gem (ID: 486977)
12.90 ct Fire Agate
25.2 x 14.7 mm
$ 99.72
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12.7ct Pear Cabochon Multicolor Green Malachite Gem (ID: 482282)
12.65 ct Malachite
15.1 x 11.3 mm
$ 13.79
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11.9ct Octagon / Scissor Cut Light Blue Aquamarine Gem (ID: 450371)
11.87 ct Aquamarine
17.4 x 10 mm
$ 2,967.50
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13ct Baguette Rose-Cut Black Spinel Gem (ID: 372541)
12.95 ct (total 25.90ctw) Spinel
17.6 x 8.2 mm
$ 185.96
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12.8ct Oval Cabochon Cream Star Moonstone Gem (ID: 418549)
12.80 ct Star Moonstone
16.3 x 13.9 mm
$ 51.20
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12.6ct Pear Cabochon Pink Kunzite Gem (ID: 471037)
12.56 ct Kunzite
17.5 x 12.8 mm
$ 37.68
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12.5ct Oval Cabochon Cream Star Moonstone Gem (ID: 484388)
12.51 ct Star Moonstone
15.3 x 13.2 mm
$ 50.04
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12.8ct Baguette Rose-Cut Black Spinel Gem (ID: 372537)
12.76 ct (total 25.51ctw) Spinel
17.6 x 8.2 mm
$ 183.16
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12.4ct Oval Cabochon Cream Star Moonstone Gem (ID: 418546)
12.43 ct Star Moonstone
18.2 x 12.4 mm
$ 49.72
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11.7ct Oval Facet Greenish Blue Tanzanite Gem (ID: 499574)
11.65 ct Tanzanite
15.4 x 11 mm
$ 3,262.00
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12.4ct Oval Cabochon Cream Star Moonstone Gem (ID: 416863)
12.35 ct Star Moonstone
14.6 x 12.3 mm
$ 49.40
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12.9ct Oval Cabochon Multicolor Bloodstone Gem (ID: 485351)
12.89 ct Bloodstone
24.3 x 8.5 mm
$ 12.89
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13ct Oval Cabochon Greenish Golden Cat's Eye Apatite Gem (ID: 385353)
12.95 ct Cat's Eye Apatite
17.3 x 10.4 mm
$ 259.00
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12.7ct Baguette Rose-Cut Black Spinel Gem (ID: 372542)
12.67 ct (total 25.34ctw) Spinel
17.6 x 8.2 mm
$ 181.94
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
Loved the wide selection of product
Posted By Miki in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
finally bought the last rock to complete my ring idea; needed another white one after giving the big diamond to my daughter. a diamond that size is out of my retired-school-teacher budget, so i bought a white zircon. went back to the same place that i got my loose sapphire-- great selection, good prices, good delivery!
Posted By Ptcmom in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I'm always real pleased with this website, I don't think there is much you could do to make it any better. I wish the shipping charges were lower, but it is understandable.
Posted By Spinch13 in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This is a site that sources valuable and genuine stones forms around the world, with and honest and descriptive sections, as well as specs, and the option to have the gemstone collection one might purchased—certified! Price ranges vary, but are always affordable and always worth it, whether it’s a gift, or for a personal business.
Posted By Bradley in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I am bored and shopping , it was fun
Posted By Nanorex in November, 2018
Source: Bizrate
Overall Rating -> 9 star ratings
I recently found a site on-line where you can purchase faceted gems. I made one purchase, and the day the gems arrived, I was so happy with them, that I immediately went back on-line and purchased four more gems! They look better "in person" than they do on the computer screen. I am making purchases for gifts.
Posted By GeneticBlend in October, 2018
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