Buy 12 mm Round Calibrated Gemstones from GemSelect
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Bi-color
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Black Round Shape 12 mm Gems
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Blue Round Shape 12 mm Gems
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Brown Round Shape 12 mm Gems
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Golden
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Gray Round Shape 12 mm Gems
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Green Round Shape 12 mm Gems
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Multicolor Round Shape 12 mm Gems
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Orange Round Shape 12 mm Gems
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Pink Round Shape 12 mm Gems
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Purple
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Red Round Shape 12 mm Gems
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Turquoise Round Shape 12 mm Gems
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Violet Round Shape 12 mm Gems
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White Round Shape 12 mm Gems
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Yellow Round Shape 12 mm Gems
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
25.59ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 28.04
7.91ct Green Jadeite, Round, Translucent
12 mm (calibrated)
$ 26.00
13.30ct Brown Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 218.57
13.13ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 40.85
7.18ct Brown Rutile Quartz, Round, Translucent
12 mm (calibrated)
$ 17.86
12.26ct Brown Tiger'S Eye, Sphere / Ball, Opaque
12 mm (calibrated)
$ 12.31
6.96ct Pink Morganite, Round, Translucent
12 mm (calibrated)
$ 76.25
5.19ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 8.53
3.30ct Multicolor Mystic Quartz, Round, VVS
12 mm (calibrated)
$ 19.72
13.93ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.78
4.26ct Multicolor Black Opal, Round, Opaque
12 mm (calibrated)
$ 124.11
9.82ct Black Star Diopside, Round, Opaque
12 mm (calibrated)
$ 48.90
7.59ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 26.94
12.25ct Multicolor Agate, Sphere / Ball, Opaque
12 mm (calibrated)
$ 9.76
6.91ctw Multicolor Pietersite, Round, Opaque
12 mm (calibrated)
$ 16.32
12.36ct White Rutile Quartz, Sphere / Ball, Translucent
12 mm (calibrated)
$ 14.23
5.60ct White Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 14.04
6.07ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 46.55
15.94ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 52.39
4.76ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 7.82
6.40ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 7.65
5.96ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 14.96
6.95ct Yellow Citrine, Round, VVS-VS
12 mm (calibrated)
$ 53.30
5.24ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 8.62
Why Buy Round Shape 12 Mm Gems from GemSelect?
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- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
overall great
Overall Rating -> 9 
I loved the selection of gemstones you have a to z
Overall Rating -> 9
Everything was good, the purchase was what I expected and what they show is what you get.
Overall Rating -> 10
I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.
Overall Rating -> 9
Ita's a pretty good and simple way to find gems that youa're looking for amazing selection
Overall Rating -> 10
On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc
