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 Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 19.75
7.56ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 33.13
25.67ctw Brown Tiger'S Eye, Sphere / Ball, Opaque
12 mm (calibrated)
$ 22.50
13.62ct Gray Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 186.53
5.13ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 20.68
6.99ct Brown Rutile Quartz, Round, Translucent
12 mm (calibrated)
$ 14.62
5.59ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 14.03
12.53ct Brown Tiger'S Eye, Sphere / Ball, Opaque
12 mm (calibrated)
$ 12.58
10.60ctw Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 48.39
11.12ctw Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 50.76
6.50ct Blue Larimar, Round, Opaque
12 mm (calibrated)
$ 74.27
6.82ct Blue Larimar, Round, Opaque
12 mm (calibrated)
$ 70.83
7.13ct Pink Strawberry Quartz, Round, Translucent
12 mm (calibrated)
$ 49.71
5.53ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 24.30
13.54ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 44.50
15.82ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 52.00
5.96ct Violet Amethyst, Round, Transparent
12 mm (calibrated)
$ 41.55
5.36ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 13.45
12.76ct Brown Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 158.86
24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque
12 mm (calibrated)
$ 15.26
14.30ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 47.00
5.46ct Violet Amethyst, Round, Transparent
12 mm (calibrated)
$ 38.06
14.91ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 46.38
25.21ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 27.62
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 
Love, and have always loved, your website.
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
Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.
Overall Rating -> 10
Wonderful purchase, can't wait to see the stone.
Overall Rating -> 10
Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.
Overall Rating -> 10
Good, hope gem quality is good and genuine
