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Home Gemstones Onyx
3.97 ct Black Onyx Gemstone, Onyx Gem in Oval Cabochon Shape for Sale.
Photos are of Actual Product for Sale
3.97 ct Black Onyx Stone, Natural Onyx in Oval Cabochon Shape for Sale Onyx Gemstone in 13 x 11 mm (calibrated) Size for Sale, Onyx Stone in Black Color

3.97ct Natural Black Onyx, Oval Cut, 13.1x11 mm

9.7 out of 10
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Product ID: 672932
Type: Onyx
Weight: 3.97 ct 1 gem
Size: 13 x 11 mm calibrated
Size: 13.1 x 11 x 3.5 mm
Exact Size: 13.08 x 11.02 x 3.47 mm
Length x Width x Depth
Shape: Oval Cabochon
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 1 pc
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$
7.91
Quantity
3 pieces available
Item in Stock
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Product Description

This is a 3.97 carat natural black Onyx gem, 1 pc in oval shape with an exact size of 13.08 x 11.02 x 3.47 mm. This loose Onyx gemstone was mined in Sri Lanka and its clarity is Opaque.

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Overall Rating -> 10 star ratings

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Posted By Jhidron in October, 2025
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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
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Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

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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.

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Posted By Crafty Seabee in March, 2026
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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
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