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Home Gemstones Onyx
3.16 ct Black Onyx Gemstone, Onyx Gem in Trillion Cabochon Shape for Sale.
Photos are of Actual Product for Sale
3.16 ct Black Onyx Stone, Natural Onyx in Trillion Cabochon Shape for Sale Onyx Gemstone in 9.8 x 9.3 mm Size for Sale, Onyx Stone in Black Color

3.16ct Natural Black Onyx, Trillion, 9.8x9.3 mm

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Product ID: 669125
Type: Onyx
Weight: 3.16 ct 1 gem
Size: mm calibrated
Size: 9.8 x 9.3 x 5 mm
Exact Size: 9.84 x 9.32 x 5.00 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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$
3.15
Quantity
3 pieces available
Item in Stock
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Product Description

This is a 3.16 carat natural black Onyx gem, 1 pc in trillion shape with an exact size of 9.84 x 9.32 x 5.00 mm. This loose Onyx gemstone was mined in Sri Lanka and its clarity is Opaque.

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Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
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Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
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Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

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A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
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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
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Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
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