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 |
5.20ct Yellow Quartz, Round, VVS-VS
12 mm (calibrated)
$ 28.49
6.39ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 25.34
5.31ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 21.06
8.09ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 28.72
5.82ct Yellow Quartz, Round, VVS-VS
12 mm (calibrated)
$ 23.09
4.70ct Multicolor Black Opal, Round, Opaque
12 mm (calibrated)
$ 118.75
5.14ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 21.57
6.41ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 25.41
8.25ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 16.28
14.84ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 48.77
13.38ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 41.63
6.08ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 15.25
8.93ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 31.69
14.22ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 46.75
5.22ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 8.57
13.75ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.20
5.58ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 30.57
4.70ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 7.73
14.65ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.58
5.69ct Pink Morganite, Round, Transparent
12 mm (calibrated)
$ 62.34
13.47ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 44.27
10.02ct Green Maw-Sit-Sit, Round, Opaque
12 mm (calibrated)
$ 23.37
5.78ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 24.25
9.28ct Gray Star Sapphire, Round, Opaque
12 mm (calibrated)
$ 355.85
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 place to buy gemstones
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
I was able to find what I've been looking for.
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.
Overall Rating -> 10
Easy process.
Overall Rating -> 10
Always get a nice gemstone. Just like the picture. Never disappointed
