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 |
6.75ct Brown Tiger'S Eye, Round, Opaque
12 mm (calibrated)
$ 8.75
13.97ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.92
5.26ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 21.15
6.37ct Blue Larimar, Round, Opaque
12 mm (calibrated)
$ 44.11
5.17ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 20.51
9.10ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 8.62
5.96ct Blue Larimar, Round, Opaque
12 mm (calibrated)
$ 68.11
8.19ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 17.94
8.02ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 13.58
14.10ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 43.87
5.04ct Brown Rutile Quartz, Round, Translucent
12 mm (calibrated)
$ 12.64
14.62ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.48
11.68ctw Multicolor Mystic Quartz, Round, VS
12 mm (calibrated)
$ 34.90
6.25ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 47.94
8.38ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 8.35
5.66ct Pink Rose Quartz, Round, Transparent
12 mm (calibrated)
$ 22.52
8.14ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 35.67
12.89ct Multicolor Agate, Sphere / Ball, Opaque
12 mm (calibrated)
$ 10.27
5.56ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 23.32
7.61ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 33.35
5.17ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 20.51
14.60ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.43
4.72ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 14.10
12.72ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 41.82
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 
Wonderful purchase, can't wait to see the stone.
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
Very good.
Overall Rating -> 10
I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.
Overall Rating -> 10
Enjoy viewing the selections. Excellent product
Overall Rating -> 9 
I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.
