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 |
8.22ct Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 17.69
8.10ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 17.75
13.84ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.48
13.13ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 40.85
14.62ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 45.48
5.92ct Orange Sunstone, Round, Translucent
12 mm (calibrated)
$ 36.12
4.78ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 7.86
5.31ct Yellow Quartz, Round, Transparent
12 mm (calibrated)
$ 21.06
9.82ct Black Star Diopside, Round, Opaque
12 mm (calibrated)
$ 48.90
8.40ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 18.41
10.06ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 21.65
5.08ct Brown Smoky Quartz, Round, VVS-VS
12 mm (calibrated)
$ 8.35
5.58ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 18.33
14.47ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 47.56
5.78ct Brown Smoky Quartz, Round, VVS
12 mm (calibrated)
$ 11.35
6.33ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 25.10
13.30ct Brown Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 218.57
13.08ct White Rutile Quartz, Sphere / Ball, Translucent
12 mm (calibrated)
$ 15.04
4.70ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 7.73
6.20ct Blue Larimar, Round, Translucent
12 mm (calibrated)
$ 74.14
5.24ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 21.07
13.21ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 41.10
8.10ct Multicolor Agate, Round, Opaque
12 mm (calibrated)
$ 13.71
24.57ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 26.93
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 
Ita's a pretty good and simple way to find gems that youa're looking for amazing selection
Overall Rating -> 10 
This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.
Overall Rating -> 10
Easy to use website
Overall Rating -> 8 
It was a good interaction I got a good gemstone for cheap
Overall Rating -> 10
Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones
Overall Rating -> 10
It was easy to navigate
