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Home Gemstones Onyx
3.10 ctw Black Onyx Gemstones, Onyx Gems in Round Cabochon Shape for Sale.
Photos are of Actual Products for Sale
3.10 ctw Black Onyx Stones, Natural Onyx in Round Cabochon Shape for Sale Onyx Gemstones in 7 mm (calibrated) Size for Sale, Onyx Stones in Black Color

3.10ct Natural Black Onyx, Round Cut, 7.17 mm

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Product ID: 686808
Type: Onyx
Weight: 3.10 ct (total) 2 gems
avg. 1.55 ct
Size: 7 mm calibrated
Size: 7.2 mm
Exact Size: 7.17 x 3.89 mm
Diameter x Depth
Shape: Round Cabochon
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 2 pcs
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Product Description

These are 3.10 carat natural black Onyx gems, 2 pcs in round shape with an exact size of 7.17 mm x 3.89 mm (avg.). These loose Onyx gemstones were mined in Sri Lanka and their clarity is Opaque.

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GemSelect Certified Store Reviews

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Overall Rating -> 10 star ratings

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

Posted By Maharishi in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

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

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate
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