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Home Gemstones Onyx
16.43 ct Black Onyx Gemstone, Onyx Gem in Oval Cabochon Shape for Sale.
Photos are of Actual Product for Sale
16.43 ct Black Onyx Stone, Natural Onyx in Oval Cabochon Shape for Sale Onyx Gemstone in 21.9 x 18.7 mm Size for Sale, Onyx Stone in Black Color

16.43ct Natural Black Onyx, Oval Cut, 21.9x18.7 mm

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Product ID: 673310
Type: Onyx
Weight: 16.43 ct 1 gem
Size: mm calibrated
Size: 21.9 x 18.7 x 6.2 mm
Exact Size: 21.90 x 18.67 x 6.23 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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Product Description

This is a 16.43 carat natural black Onyx gem, 1 pc in oval shape with an exact size of 21.90 x 18.67 x 6.23 mm. This loose Onyx gemstone was mined in Sri Lanka and its clarity is Opaque.

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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
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Very neat and to the point

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I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
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Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

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