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 |
15.28ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 50.22
5.11ct Multicolor Mystic Quartz, Round, VS
12 mm (calibrated)
$ 12.72
4.78ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 7.86
13.30ct Brown Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 218.57
23.25ctw Yellow Rutile Quartz, Sphere / Ball, Transparent
12 mm (calibrated)
$ 25.48
6.14ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 39.24
10.95ct Black Star Diopside, Round, Opaque
12 mm (calibrated)
$ 54.53
6.14ct Pink Strawberry Quartz, Round, Translucent
12 mm (calibrated)
$ 37.54
6.24ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 17.09
5.19ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 20.58
13.01ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 40.49
5.13ct Multicolor Mystic Quartz, Round, VVS-VS
12 mm (calibrated)
$ 15.33
13.84ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.48
5.19ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 8.53
12.77ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 39.74
7.03ct Blue Larimar, Round, Opaque
12 mm (calibrated)
$ 73.02
4.91ct Orange Sunstone, Round, Translucent
12 mm (calibrated)
$ 29.97
7.55ct Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 9.02
14.91ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 46.38
7.00ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 17.56
5.06ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 21.23
5.38ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 13.50
13.49ct Gray Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 218.02
14.86ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 48.85
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 
Easy and functional
Overall Rating -> 10
They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.
Overall Rating -> 10
I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.
Overall Rating -> 10
It was easy to navigate
Overall Rating -> 9 
Plan on purchasing on an ongoing basis. So far.....so good....
Overall Rating -> 9
They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!
