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 |
5.42ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 17.82
14.62ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.48
9.66ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 21.17
8.90ct Multicolor Ruby-Zoisite, Round, Opaque
12 mm (calibrated)
$ 21.63
27.14ctw Brown Rutile Quartz, Sphere / Ball, Transparent
12 mm (calibrated)
$ 24.78
11.50ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 35.79
5.57ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 22.46
5.52ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 9.07
14.92ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 49.04
13.85ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.53
5.28ct Yellow Quartz, Round, VVS-VS
12 mm (calibrated)
$ 11.57
11.65ctw White Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 25.53
5.51ct Brown Smoky Quartz, Round, Transparent
12 mm (calibrated)
$ 23.12
6.73ct Brown Rutile Quartz, Round, Translucent
12 mm (calibrated)
$ 16.88
4.90ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 19.75
12.95ct Gray Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 212.83
10.02ctw Yellow Quartz, Round, VVS-VS
12 mm (calibrated)
$ 45.74
8.24ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 7.80
4.55ct Multicolor Black Opal, Round, Opaque
12 mm (calibrated)
$ 135.95
4.61ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 7.58
4.65ct Multicolor Pietersite, Round, Opaque
12 mm (calibrated)
$ 10.97
9.27ct Black Star Diopside, Round, Opaque
12 mm (calibrated)
$ 46.16
5.78ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 11.35
6.15ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 12.06
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 
Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.
Overall Rating -> 10
hassle free experience.
Overall Rating -> 10
Easy to use website
Overall Rating -> 10
I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?
Overall Rating -> 10
Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!
Overall Rating -> 10
the selection is good as are the prices
