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 |
10.69ctw Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 35.33
14.02ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 46.08
5.88ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 37.58
6.25ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 47.94
9.10ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 8.62
8.40ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 18.41
5.96ct Blue Larimar, Round, Opaque
12 mm (calibrated)
$ 68.11
5.42ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 14.85
7.68ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 7.27
7.98ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 28.34
5.56ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 23.32
6.89ctw Multicolor Pietersite, Round, Opaque
12 mm (calibrated)
$ 26.00
6.08ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 15.25
6.16ct Violet Amethyst, Round, VVS-VS
12 mm (calibrated)
$ 36.81
5.59ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 22.48
6.73ct Blue Larimar, Round, Opaque
12 mm (calibrated)
$ 69.89
4.76ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 7.82
6.34ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 10.42
6.60ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 21.70
8.50ct Black Star Diopside, Round, Opaque
12 mm (calibrated)
$ 42.33
24.57ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 26.93
6.69ct Brown Smoky Quartz, Round, VVS
13 mm (calibrated)
$ 22.00
8.24ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 7.80
8.13ct Green Jadeite, Round, Translucent
12 mm (calibrated)
$ 26.73
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 
Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.
Overall Rating -> 10
I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!
Overall Rating -> 9 
Very good and simple exchange
Overall Rating -> 10
GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'
Overall Rating -> 10
I have been very happy with my prior purchases and enjoy the website experience.
Overall Rating -> 10
Had a great experience and the prices are great
