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Buy 12 mm Round Calibrated Gemstones from GemSelect

Round Shape 12 mm Gems Weight
Round Shape 12 mm Gems Size
Round Shape 12 mm Gems Clarity
Round Shape 12 mm Gems Price

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color
Black Round Shape 12 mm Gems
Blue Round Shape 12 mm Gems
Brown Round Shape 12 mm Gems
Golden
Gray Round Shape 12 mm Gems
Green Round Shape 12 mm Gems
Multicolor Round Shape 12 mm Gems
Orange Round Shape 12 mm Gems
Pink Round Shape 12 mm Gems
Purple
Red Round Shape 12 mm Gems
Turquoise Round Shape 12 mm Gems
Violet Round Shape 12 mm Gems
White Round Shape 12 mm Gems
Yellow Round Shape 12 mm Gems
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5.84ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 9.60

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8.22ct Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 17.69

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5.59ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 20.21

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7.65ct Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 16.45

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5.03ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 16.53

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6.40ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 7.65

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24.81ctw Multicolor Jasper, Sphere / Ball, Opaque

12 mm (calibrated)

$ 27.18

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5.32ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 29.14

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12.82ctw Yellow Quartz, Round, VVS

12 mm (calibrated)

$ 42.37

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5.91ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 45.33

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6.41ct Yellow Quartz, Round, VVS

12 mm (calibrated)

$ 25.41

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4.96ct Brown Rutile Quartz, Round, Transparent

12 mm (calibrated)

$ 12.45

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5.26ct Yellow Quartz, Round, VVS

12 mm (calibrated)

$ 23.11

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11.09ct Black Star Diopside, Round, Opaque

12 mm (calibrated)

$ 55.23

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5.42ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 41.57

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6.84ct Brown Tiger'S Eye, Round, Opaque

12 mm (calibrated)

$ 8.86

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5.98ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 45.87

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4.86ct Brown Smoky Quartz, Round, Transparent

12 mm (calibrated)

$ 20.38

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5.60ct White Rutile Quartz, Round, Transparent

12 mm (calibrated)

$ 14.04

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12.70ct Multicolor Agate, Sphere / Ball, Opaque

12 mm (calibrated)

$ 10.12

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5.99ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 45.93

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10.25ctw Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 33.70

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11.18ctw Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 24.05

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14.99ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 49.27

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Why Buy Round Shape 12 Mm Gems from GemSelect?

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Had to get here via the Facebook page. Googling direct brought up an error message.

Posted By Chip in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate
Enlarged Gemstone Image