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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (494): 16 Carat Gems Clear All
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16.2ct Octagon / Scissor Cut Lemon Quartz Gem (ID: 398975)
16.17 ct Quartz
17.7 x 13.3 mm
$ 25.71
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1 pc
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15.9ct Oval Cabochon Orange Cream Star Moonstone Gem (ID: 262109)
15.93 ct Star Moonstone
14.2 x 13.4 mm
$ 63.72
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3 pcs
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16.1ct Drilled Sphere Multicolor Jasper Gem (ID: 469882)
16.09 ct (total 48.28ctw) Jasper
12.6 mm
$ 25.11
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16.1ct Octagon Step Cut Purplish Pink Mystic Topaz Gem (ID: 484923)
16.13 ct Mystic Topaz
15.9 x 12.1 mm
$ 145.17
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16.9ct Cushion Cabochon Pink Smithsonite Gem (ID: 380712)
16.90 ct Smithsonite
14.5 x 13.2 mm
$ 455.29
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16.8ct Octagon / Scissor Cut Blue Zircon Gem (ID: 337548)
16.80 ct Zircon
17 x 9.4 mm
$ 5,078.84
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16.6ct Pear Cabochon Black Gold Sheen Obsidian Gem (ID: 433834)
16.62 ct Obsidian
26 x 15 mm
$ 16.62
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16ct Pencil Blue Lapis Lazuli Gem (ID: 488654)
16.02 ct Lapis Lazuli
29.3 x 7.6 mm
$ 4.49
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15.7ct Oval Cabochon Multicolor Opal Gem (ID: 462134)
15.72 ct Opal
19.5 x 17.1 mm
$ 632.89
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16.9ct Pencil Blue Lapis Lazuli Gem (ID: 487135)
16.93 ct Lapis Lazuli
34.1 x 7.1 mm
$ 4.74
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15.7ct Oval Facet Greenish Golden Apatite Gem (ID: 398364)
15.65 ct Apatite
18.8 x 13.5 mm
$ 745.10
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15.9ct Fancy Cabochon Multicolor Fossil Coral Gem (ID: 475089)
15.90 ct Fossil Coral
23.1 x 12.4 mm
$ 28.62
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2 pcs
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16.1ct Oval Cabochon Multicolor Fossil Coral Gem (ID: 450012)
16.06 ct (total 32.11ctw) Fossil Coral
22.6 x 14 mm
$ 64.22
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15.6ct Fancy Cabochon Pink Kunzite Gem (ID: 471023)
15.64 ct Kunzite
25 x 10.4 mm
$ 46.92
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16.9ct Oval Cabochon Pink Rose Quartz Gem (ID: 364378)
16.91 ct Rose Quartz
17.8 x 13.3 mm
$ 25.36
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17ct Pear Cabochon Bluish White Rainbow Moonstone Gem (ID: 491444)
16.98 ct Rainbow Moonstone
19.6 x 17.3 mm
$ 28.36
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16.1ct Cushion Cabochon Multicolor Fossil Coral Gem (ID: 475088)
16.06 ct Fossil Coral
17.5 x 13.5 mm
$ 28.91
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16.1ct Pear Facet Colorless Golden Rutile Quartz Gem (ID: 403667)
16.11 ct Rutile Quartz
22.9 x 14.8 mm
$ 85.22
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16.2ct Oval Facet Red Strawberry Quartz Gem (ID: 472440)
16.21 ct Strawberry Quartz
19.1 x 15.2 mm
$ 113.47
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Click for Product Video (433523)
16.5ct Fancy Crystal Cluster Blue Druzy Azurite Gem (ID: 433523)
16.52 ct Druzy Azurite
15.9 x 15.7 mm
$ 82.60
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16.9ct Round Cabochon Mocha Moonstone Gem (ID: 268772)
16.89 ct Moonstone
17.2 mm
$ 76.00
Item in Stock
16 Carat Gems
Buy gems by weight. Shop from our extensive range of beautiful, natural 16-carat gems. Browse the largest selection of natural loose colored gemstones available in 16 carats. Our large gemstone selection includes many popular gem types, such as amethyst, citrine, topaz 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 'tourmaline' to see all of our 16-carat tourmaline gems. Select 'multicolor' to shop for 16-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 -> 9 star ratings
My selection was made quickly and efficiently.
Posted By JimC in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
GemSelect has a great selection at reasonable prices. Gemstones are always as beautiful as pictured.
Posted By GemLover in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Colors and qualities of gems are very well represented online. Easy to use website. Great selections!
Posted By in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This was my second purchase from GemSelect and definitely won’t be my last! They have a very wide variety of gems and you can always find what you are looking for with ease and the prices are very good.
Posted By Jill in November, 2018
Source: Bizrate
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
Popular Gemstones
All Gemstones (144)
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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