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 |
5.33ct Yellow Quartz, Round, VS
12 mm (calibrated)
$ 11.69
8.67ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 14.68
15.27ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 50.19
6.33ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 25.10
5.77ct Brown Rutile Quartz, Round, Translucent
12 mm (calibrated)
$ 14.48
5.06ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 21.23
11.10ctw Multicolor Pietersite, Round, Opaque
12 mm (calibrated)
$ 26.20
5.35ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 29.32
6.89ctw Multicolor Pietersite, Round, Opaque
12 mm (calibrated)
$ 26.00
14.33ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 44.59
5.24ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 21.07
5.51ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 23.12
27.60ctw Yellow Rutile Quartz, Sphere / Ball, Transparent
12 mm (calibrated)
$ 30.24
7.34ct Pink Morganite, Round, Translucent
12 mm (calibrated)
$ 80.42
5.32ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 14.57
24.57ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 26.93
14.27ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 46.90
9.29ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 20.36
13.13ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 40.85
5.29ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 20.98
5.56ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 23.32
15.51ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 33.37
5.59ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 22.17
9.85ctw Yellow Citrine, Round, Transparent
12 mm (calibrated)
$ 75.55
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 
Good, hope gem quality is good and genuine
Overall Rating -> 10
I am filling a small treasure chest and picked a nice amethyst.
Overall Rating -> 10
I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.
Overall Rating -> 10
It was easy to navigate
Overall Rating -> 9 
The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.
Overall Rating -> 10
I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.
