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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (518): 20 Carat Gems Clear All
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19.9ct Round Facet Green to Pink Color-Change Diaspore Gem (ID: 381559)
19.90 ct Color-Change Diaspore
15.4 mm
$ 6,500.92
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19.4ct Oval Cabochon Pink Rose Quartz Gem (ID: 328839)
19.37 ct Rose Quartz
20 x 15 mm
$ 23.24
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4 pcs
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19.5ct Drilled Sphere Green Seraphinite Gem (ID: 447456)
19.45 ct (total 77.78ctw) Seraphinite
14.2 mm
$ 116.67
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20.6ct Oval Cabochon Green Fluorite Gem (ID: 475466)
20.63 ct Fluorite
17 x 14.3 mm
$ 82.52
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21ct Fancy Cabochon Multicolor Rhodochrosite Gem (ID: 447736)
20.95 ct Rhodochrosite
22.9 x 13.7 mm
$ 50.49
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19.8ct Carved Marquise Peach Orange Moonstone Gem (ID: 501430)
19.78 ct Moonstone
42.6 x 17.9 mm
$ 52.42
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Click for Product Video (350892)
20.3ct Oval Cabochon Black Star Sapphire Gem (ID: 350892)
20.32 ct Star Sapphire
19.2 x 15.9 mm
$ 553.92
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20.4ct Round Cabochon Purple Amethyst Gem (ID: 363264)
20.41 ct Amethyst
18.1 mm
$ 102.05
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20.1ct Oval Cabochon Violet Amethyst Gem (ID: 393355)
20.07 ct Amethyst
17.5 x 14.8 mm
$ 100.35
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19.9ct Round Cabochon Violet Amethyst Gem (ID: 393227)
19.94 ct Amethyst
17.9 mm
$ 99.70
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20.2ct Cushion Cabochon Multicolor Fossil Coral Gem (ID: 450155)
20.23 ct (total 40.46ctw) Fossil Coral
19.3 x 19 mm
$ 80.92
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20.3ct Oval Facet Red Strawberry Quartz Gem (ID: 472448)
20.31 ct Strawberry Quartz
19.3 x 15.5 mm
$ 142.17
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19.9ct Round Cabochon Violet Amethyst Gem (ID: 391463)
19.86 ct Amethyst
18 mm
$ 99.30
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19.8ct Fancy Crystal Cluster Multicolor Agate Geode Gem (ID: 447001)
19.82 ct (total 39.64ctw) Agate Geode
23.7 x 18 mm
$ 99.10
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Click for Product Video (437953)
20.5ct Pear Facet Pink Kunzite Gem (ID: 437953)
20.48 ct Kunzite
18.2 x 14.8 mm
$ 409.60
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19.7ct Oval Facet Red Strawberry Quartz Gem (ID: 471614)
19.68 ct Strawberry Quartz
20.7 x 16 mm
$ 137.76
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19.8ct Round Cabochon Violet Amethyst Gem (ID: 393223)
19.82 ct Amethyst
18 mm
$ 99.10
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20ct Pencil Multicolor Jasper Gem (ID: 486758)
20.04 ct Jasper
33.6 x 8.6 mm
$ 5.61
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Click for Product Video (437951)
19.8ct Oval Facet Pink Kunzite Gem (ID: 437951)
19.84 ct Kunzite
18 x 11.8 mm
$ 396.80
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20ct Cushion Cabochon Green Fluorite Gem (ID: 493617)
19.97 ct Fluorite
21.5 x 15.7 mm
$ 39.94
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19.3ct Pear Facet Bi-Color Ametrine Gem (ID: 333116)
19.29 ct Ametrine
22.3 x 15.9 mm
$ 192.90
Item in Stock
20 Carat Gems
Buy gems by carat weight. Shop from our extensive range of beautiful, natural 20 carat gems. Browse the largest selection of natural loose colored gemstones available in 20 carats. Our wide gemstone selection includes many popular gem types, such as amethyst, citrine, rose quartz and turquoise, and lesser-known gems, including ruby-zoisite, 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 'tiger's eye' to see all of our 20-carat tiger's eye gems. Select 'violet' to shop for 20-carat purple 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
This site always has beautiful stones to choose from and you will get the actual gem that is pictured. The shipping is fast and reasonably priced.
Posted By CAC in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have not gotten my gems, but when i do i will be very happy, yet i did not like you had to pay $15 extra for faster shipping
Posted By Jack in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I love GemSelect, personally. I browse their site almost daily to see all the new stones available. Their selection is pretty amazing. The quality isn't always the highest and the cut of the stones isn't always perfect. But for the price, and if you look hard enough, you can find a real gem, so to speak.
Posted By Patrick in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I would recommend to a friend because of the quality of the products purchased. The gemstone quality is very high and the gems purchased are beautiful. Any friends interested in having custom jewelry made would definitely be recommended to the site. Also, every shipment is handled with care and I am very pleased with that.
Posted By Isaiah in September, 2018
Source: Bizrate
Overall Rating -> 9 star ratings
Gem Select has an excellent selection of gemstones, including some rare ones. Prices are as expected.
Posted By Mike in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Excelente proceso de compra!!
Posted By Mariana in September, 2018
Source: Bizrate
Popular Gemstones
All Gemstones (141)
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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