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 |
7.27ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 19.91
25.21ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 27.62
4.85ct Green Seraphinite, Round, Opaque
12 mm (calibrated)
$ 4.69
6.96ct Pink Morganite, Round, Translucent
12 mm (calibrated)
$ 76.25
10.10ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 9.56
9.27ct Black Star Diopside, Round, Opaque
12 mm (calibrated)
$ 46.16
14.27ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 46.90
5.04ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 8.28
12.36ct White Rutile Quartz, Sphere / Ball, Translucent
12 mm (calibrated)
$ 14.23
5.89ct Yellow Quartz, Round, VVS-VS
12 mm (calibrated)
$ 23.36
5.58ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 10.95
15.28ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 50.22
5.91ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 45.33
6.20ct Blue Larimar, Round, Translucent
12 mm (calibrated)
$ 74.14
13.08ct White Rutile Quartz, Sphere / Ball, Translucent
12 mm (calibrated)
$ 15.04
8.19ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 17.94
5.08ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 8.35
24.04ctw Brown Tiger'S Eye Matrix, Sphere / Ball, Opaque
12 mm (calibrated)
$ 12.51
14.77ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.97
7.65ct Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 16.45
6.67ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 21.92
25.59ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 28.04
3.30ct Multicolor Mystic Quartz, Round, VVS
12 mm (calibrated)
$ 19.72
15.04ct Multicolor Agate, Sphere / Ball, Opaque
12 mm (calibrated)
$ 11.99
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 how easy the site is to use. Really love that the pictures are of actual product.
Overall Rating -> 9 
I've made several purchases over the last 8 years and I've never been less than happy with any of them.
Overall Rating -> 10
I love the products. I've bought them as gifts and people love my gifts
Overall Rating -> 10
Always get a nice gemstone. Just like the picture. Never disappointed
Overall Rating -> 10
I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items
Overall Rating -> 10
Great! Affordable
