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 |
13.54ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 44.50
4.90ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 19.75
5.53ct Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 24.30
6.99ct Brown Rutile Quartz, Round, Translucent
12 mm (calibrated)
$ 14.62
25.67ctw Brown Tiger'S Eye, Sphere / Ball, Opaque
12 mm (calibrated)
$ 22.50
5.59ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 14.03
13.62ct Gray Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 186.53
11.12ctw Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 50.76
5.13ct Brown Smoky Quartz, Round, VS
12 mm (calibrated)
$ 20.68
12.53ct Brown Tiger'S Eye, Sphere / Ball, Opaque
12 mm (calibrated)
$ 12.58
7.13ct Pink Strawberry Quartz, Round, Translucent
12 mm (calibrated)
$ 49.71
15.82ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 52.00
7.56ct White Quartz Cat'S Eye, Round, Transparent
12 mm (calibrated)
$ 33.13
10.60ctw Yellow Quartz, Round, VVS
12 mm (calibrated)
$ 48.39
6.50ct Blue Larimar, Round, Opaque
12 mm (calibrated)
$ 74.27
5.46ct Violet Amethyst, Round, Transparent
12 mm (calibrated)
$ 38.06
24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque
12 mm (calibrated)
$ 15.26
5.36ct Brown Rutile Quartz, Round, Transparent
12 mm (calibrated)
$ 13.45
12.76ct Brown Pearl, Sphere / Ball, Opaque
12 mm (calibrated)
$ 158.86
5.96ct Violet Amethyst, Round, Transparent
12 mm (calibrated)
$ 41.55
14.30ctw Black Spinel, Round, Opaque
12 mm (calibrated)
$ 47.00
20.89ctw Multicolor Jasper, Sphere / Ball, Opaque
12 mm (calibrated)
$ 22.89
6.05ct Yellow Citrine, Round, VVS
12 mm (calibrated)
$ 46.41
8.10ctw Multicolor Labradorite, Round, Translucent
12 mm (calibrated)
$ 17.75
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 
My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.
Overall Rating -> 9 
It was fine . Wish there had been more round stones to select from
Overall Rating -> 10
I enjoyed the enormous amount of knowledge on your site. It helped me choose the gems I purchased.
Overall Rating -> 10
I have made many purchases from GemSelect over the years, and I have a beautiful collection of jewelry as a result. My purchases have always been exactly as described, and I have enjoyed doing business with you.
Overall Rating -> 10
All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.
Overall Rating -> 10
Excellent options
