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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (484): 20 Carat Gems Clear All
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Pink Rose Quartz Gem - 20.2ct Briolette with Hole (ID: 364896)

Briolette Pink Rose Quartz

20.2ct
20.4 x 13.3 mm
$ 40.86
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Yellow Golden Citrine Gem - 20.5ct Oval Facet (ID: 397367)

Oval Yellow Citrine

20.5ct
21.4 x 15.1 mm
$ 143.78
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Multicolor Jasper Gem - 21ct Oval Cabochon (ID: 363302)

Oval Multicolor Jasper

21ct
25.2 x 18.1 mm
$ 41.90
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Green Prehnite Gem - 21ct Carved Fruit (ID: 469491)

Fancy Green Prehnite

21ct
25 x 12.7 mm
$ 33.12
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Green Maw-Sit-Sit Gem - 20ct Square Sugarloaf Cabochon (ID: 476985)

Square Green Maw-Sit-Sit

20ct
15.2 x 14.6 mm
$ 59.94
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Swiss Blue Topaz Gem - 20.9ct Trillion Concave Fantasy Cut (ID: 486089)

Trillion Blue Topaz

20.9ct
22.8 x 15.6 mm
$ 125.40
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Colorless Golden Rutile Quartz Gem - 19.9ct Pear Cabochon (ID: 402314)

Pear Yellow Rutile Quartz

19.9ct
22.1 x 21 mm
$ 63.75
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Multicolor Ammolite Gem - 21ct Shark Fin Cabochon (ID: 494352)

Fancy Multicolor Ammolite

21ct
31 x 13.9 mm
$ 314.85
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Green to Pink Color-Change Diaspore Gem - 19.9ct Round Facet (ID: 381559)

Round Multicolor Color-Change Diaspore

19.9ct
15.4 mm
$ 6,500.92
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Multicolor Ammolite Gem - 20.4ct Shark Fin Cabochon (ID: 494368)

Fancy Multicolor Ammolite

20.4ct
25.9 x 21.1 mm
$ 306.60
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Golden Apatite Gem - 20.4ct Octagon Facet (ID: 384010)

Octagon / Emerald Cut Yellow Apatite

20.4ct
17.5 x 13.2 mm
$ 612.90
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Yellow Citrine Gem - 20.8ct Round Facet (ID: 329003)

Round Yellow Citrine

20.8ct
18.1 mm
$ 141.71
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Violet to Blue Color-Change Fluorite Gem - 20.9ct Oval Facet (ID: 445416)

Oval Multicolor Color-Change Fluorite

20.9ct
20.2 x 15.2 mm
$ 525.18
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Multicolor Mother of Pearl Gem - 20.1ct Carved Leaf (ID: 501450)

Fancy Multicolor Mother of Pearl

20.1ct
44.8 x 32.9 mm
$ 62.74
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Swiss Blue Topaz Gem - 20.6ct Oval Facet (ID: 500421)

Oval Blue Topaz

20.6ct
17.1 x 13.3 mm
$ 123.78
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Swiss Blue Topaz Gem - 19.2ct Fancy Facet (ID: 409759)

Fancy Blue Topaz

19.2ct
20.6 x 15.5 mm
$ 134.61
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Black Star Sapphire Gem - 20.3ct Oval Cabochon (ID: 350892)

Oval Black Star Sapphire

20.3ct
19.2 x 15.9 mm
$ 553.92
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Pink Rose Quartz Gem - 20.1ct Oval Cabochon (ID: 344833)

Oval Pink Rose Quartz

20.1ct
20.2 x 16.6 mm
$ 27.07
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Violet to Blue Color-Change Fluorite Gem - 20.6ct Oval Facet (ID: 445418)

Oval Multicolor Color-Change Fluorite

20.6ct
20.1 x 15.1 mm
$ 515.39
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2 pcs
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Multicolor Fossil Coral Gem - 20.2ct Cushion Cabochon (ID: 450155)

Cushion Multicolor Fossil Coral

20.23 ct (total 40.46ctw)
19.3 x 19 mm
$ 80.92
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Green Variscite Gem - 20.5ct Pear Cabochon (ID: 363118)

Pear Green Variscite

20.5ct
27 x 18 mm
$ 102.40
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.
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Posted By BO in January, 2019
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As Always never disappointed in any gemstone I purchase from this site. I have never had a problem. Thank-You Gemselect for offering such a comprehensive variety . I will continue to order from this site.
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Better than what I expected. Beautifully cut gem!
Posted By in January, 2019
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Overall Rating -> 10 star ratings
Gem select is the most trustworthy web site for gems. What I see in the picture is exactly what I get. Size is indicated by carat weight, and not the picture size, as they are trying to give an up close view of the gem I am hoping to buy. It was so easy to find the stones I was looking for at a price I could afford.
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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