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 |
4.90ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 8.06
5.53ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 10.85
6.15ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 12.06
3.43ct Multicolor Pietersite, Round, Opaque
12 mm (calibrated)
$ 8.30
12.72ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 41.82
9.53ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 9.50
4.70ct Multicolor Black Opal, Round, Opaque
12 mm (calibrated)
$ 118.75
24.04ctw Brown Tiger'S Eye Matrix, Sphere / Ball, Opaque
12 mm (calibrated)
$ 12.51
6.24ct Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 15.17
6.66ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 18.24
6.13ct Multicolor Pietersite, Round, Opaque
12 mm (calibrated)
$ 12.37
6.28ctw Multicolor Pietersite, Round, Opaque
12 mm (calibrated)
$ 14.70
14.77ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.97
5.56ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 23.32
5.98ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 45.87
11.38ct White Rutile Quartz, Sphere / Ball, Translucent
12 mm (calibrated)
$ 13.10
6.16ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 47.24
25.21ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 27.62
12.95ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 42.57
12.26ct Brown Tiger'S Eye, Sphere / Ball, Opaque
12 mm (calibrated)
$ 12.31
14.60ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.43
6.67ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 21.92
14.84ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 48.77
4.72ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 14.10
Why Buy Round Shape 12 Mm Gems from GemSelect?
- Trusted Worldwide Since 2003
- 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 
Great experience. I can't wait to explore on the website further.
Overall Rating -> 9 
Very good and simple exchange
Overall Rating -> 10
My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.
Overall Rating -> 10
love the site, the experience and the products.
Overall Rating -> 10
I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.
Overall Rating -> 10
Very large selection from affordable to high end I will be coming back to shop again!
