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 |
7.30ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 31.99
7.66ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 15.11
20.89ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 22.89
7.51ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 26.74
6.16ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 47.24
4.55ct Multicolor Black Opal, Round, Opaque
12 mm (calibrated)
$ 135.95
4.46ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 24.44
5.50ct Pink Rose Quartz, Round, Transparent
12 mm (calibrated)
$ 21.88
5.35ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 17.59
6.96ct Black Star Diopside, Round, Opaque
12 mm (calibrated)
$ 34.66
7.82ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 13.24
14.92ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 49.04
4.06ct Multicolor Opal, Round, Opaque
12 mm (calibrated)
$ 121.31
6.33ct Turquoise Larimar, Round, Opaque
12 mm (calibrated)
$ 75.08
4.94ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 27.06
5.08ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 8.35
7.91ct Green Jadeite, Round, Translucent
12 mm (calibrated)
$ 26.00
5.13ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 8.43
5.16ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 20.81
8.02ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 13.58
14.10ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 43.87
5.58ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 18.33
6.24ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 24.75
4.90ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 8.06
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 
Easy to conduct search, good amount of stock to select from along with variety of prices.
Overall Rating -> 10
I have been very happy with my prior purchases and enjoy the website experience.
Overall Rating -> 10
It was good. There was a large selection at prices I could afford.
Overall Rating -> 10
I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.
Overall Rating -> 10
Was a good experience.
Overall Rating -> 10
My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.
