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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (802): 13 Carat Gems Clear All
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13.1ct Octagon Step Cut Bi-color Tourmaline Gem (ID: 402789)
13.13 ct Tourmaline
12.3 x 11.5 mm
$ 2,109.50
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13ct Marquise Cabochon Multicolor Jasper Gem (ID: 391193)
13.00 ct (total 26.00ctw) Jasper
30.4 x 12.2 mm
$ 39.00
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13.7ct Fancy Cabochon Multicolor Fire Agate Gem (ID: 489253)
13.68 ct Fire Agate
18.8 x 15.7 mm
$ 106.57
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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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13.8ct Carved Flower Yellow Orange Citrine Gem (ID: 471456)
13.81 ct (total 27.61ctw) Citrine
15.2 x 15 mm
$ 193.27
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13.4ct Fancy Cabochon Multicolor Fire Agate Gem (ID: 486973)
13.42 ct Fire Agate
18.8 x 12.9 mm
$ 103.74
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13.2ct Round Cabochon Gray Blue Sheen Labradorite Gem (ID: 489580)
13.18 ct Labradorite
17.3 mm
$ 13.31
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13.9ct Octagon Step Cut Golden Apatite Gem (ID: 382104)
13.92 ct Apatite
13.2 x 15.6 mm
$ 895.49
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12.9ct Baguette Rose-Cut Black Spinel Gem (ID: 372535)
12.86 ct (total 25.72ctw) Spinel
17.7 x 8.3 mm
$ 184.67
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12.8ct Drilled Sphere Colorless Golden Rutile Quartz Gem (ID: 434894)
12.75 ct (total 25.49ctw) Rutile Quartz
12.2 mm
$ 25.49
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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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13.4ct Octagon Step Cut Purplish Pink Mystic Topaz Gem (ID: 484922)
13.44 ct Mystic Topaz
15.5 x 12 mm
$ 120.96
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13.9ct Asscher Cut White Quartz Gem (ID: 396037)
13.92 ct Quartz
15 x 15 mm
$ 22.13
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13.4ct Oval Cabochon Multicolor Jasper Gem (ID: 365833)
13.44 ct (total 26.88ctw) Jasper
20.2 x 15.2 mm
$ 40.32
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Click for Product Video (450376)
13.9ct Octagon / Scissor Cut Light Blue Aquamarine Gem (ID: 450376)
13.90 ct Aquamarine
25.6 x 8.4 mm
$ 2,780.00
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13ct Oval Cabochon Cream Star Moonstone Gem (ID: 418542)
13.02 ct Star Moonstone
18.1 x 14.2 mm
$ 52.08
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13ct Octagon Step Cut Purplish Pink Mystic Topaz Gem (ID: 484920)
13.04 ct Mystic Topaz
16.1 x 12.1 mm
$ 117.36
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13.8ct Octagon / Scissor Cut Light Blue Aquamarine Gem (ID: 450375)
13.81 ct Aquamarine
18.4 x 10.3 mm
$ 2,762.00
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Click for Product Video (338281)
13.6ct Spherical Silver Pearl Gem (ID: 338281)
13.62 ct Pearl
12.4 mm
$ 204.30
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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 Baguette Rose-Cut Black Spinel Gem (ID: 374181)
12.64 ct (total 25.28ctw) Spinel
17.6 x 8.2 mm
$ 182.52
Item in Stock
13 Carat Gems
Buy gems by weight. Shop from our extensive range of beautiful, natural 13 carat gems. Browse the largest selection of natural loose colored gemstones available in 13 carats. Our large gemstone selection includes many popular gem types, such as amethyst, citrine, topaz and turquoise, and lesser-known gems, including rhodochrosite, ammolite and maw-sit-sit. 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 'tourmaline' to see all of our 13-carat tourmaline gems. Select 'multicolor' to shop for 13-carat multicolor 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
first purchase, this is a test
Posted By Bob in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have purchased from Gemselect before, the shopping is easy, clear and quick. You have a wide range of products so I can adjust what I want to how much I can spend! The photos of the gems are beautiful and make it easy to choose the one suits me best! I honestly cannot fault you in any way at all! The delivery is always timely too! You guys rock! ;)
Posted By Ljimac1883 in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Website easy to use!!
Posted By Jody in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Easy to use. and fast shipping
Posted By Jj in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Gem Select is a wonderful site for a small business it took us a little time to get acquainted with the site but it all works well. We are happy with the quality and the merchandise and the certificate option.
Posted By Paddy whack in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Easy to use and informative website. There was more than ample information provided about the gemstones and the process.
Posted By Kathy in September, 2018
Source: Bizrate
Popular Gemstones
All Gemstones (139)
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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