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Home Gemstones Onyx
3.35 ct Black Onyx Gemstone, Onyx Gem in Trillion Cabochon Shape for Sale.
Photos are of Actual Product for Sale
3.35 ct Black Onyx Stone, Natural Onyx in Trillion Cabochon Shape for Sale Onyx Gemstone in 9.9 x 9.3 mm Size for Sale, Onyx Stone in Black Color

3.35ct Natural Black Onyx, Trillion, 9.9x9.3 mm

9.7 out of 10
See Bizrate Ratings for GemSelect
Product ID: 669133
Type: Onyx
Weight: 3.35 ct 1 gem
Size: mm calibrated
Size: 9.9 x 9.3 x 5 mm
Exact Size: 9.86 x 9.31 x 4.98 mm
Length x Width x Depth
Shape: Trillion Cabochon
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 1 pc
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$
4.02
Quantity
2 pieces available
Item is Sold
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Product Description

This is a 3.35 carat natural black Onyx gem, 1 pc in trillion shape with an exact size of 9.86 x 9.31 x 4.98 mm. This loose Onyx gemstone was mined in Sri Lanka and its clarity is Opaque.

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GemSelect Certified Store Reviews

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Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate
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