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 |
5.22ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 8.57
5.04ct Brown Rutile Quartz, Round, Translucent
12 mm (calibrated)
$ 12.64
23.25ctw Yellow Rutile Quartz, Sphere / Ball, Transparent
12 mm (calibrated)
$ 25.48
6.24ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 24.75
6.16ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 25.85
14.22ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 46.75
5.28ct Yellow Quartz, Round, VVS-VS
12 mm (calibrated)
$ 11.57
5.09ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 8.37
13.97ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.92
14.62ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.48
4.61ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 7.58
13.73ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.13
5.30ct Yellow Citrine, Round, VS
12 mm (calibrated)
$ 46.46
5.48ct Multicolor Mystic Quartz, Round, VVS-VS
12 mm (calibrated)
$ 16.38
9.29ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 20.36
5.17ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 20.51
15.15ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 49.80
25.94ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 28.42
11.68ctw Multicolor Mystic Quartz, Round, VS
12 mm (calibrated)
$ 34.90
4.43ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 7.29
13.07ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 42.96
7.27ct Black Spinel, Round, Opaque
12 mm (calibrated)
$ 23.90
27.53ctw Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 34.27
12.70ct Multicolor Agate, Sphere / Ball, Opaque
12 mm (calibrated)
$ 10.12
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 -> 9 
All good
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
overall great
Overall Rating -> 8 
Good prices
Overall Rating -> 8
It was a good interaction I got a good gemstone for cheap
Overall Rating -> 10
Always get a nice gemstone. Just like the picture. Never disappointed
