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4.20 ct Black Onyx Gemstone, Onyx Gem in Oval Cabochon Shape for Sale.
Photos are of Actual Product for Sale
4.20 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

4.20ct Natural Black Onyx, Oval Cut, 13.1x11.1 mm

9.7 out of 10
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Product ID: 672936
Type: Onyx
Weight: 4.20 ct 1 gem
Size: 13 x 11 mm calibrated
Size: 13.1 x 11.1 x 3.5 mm
Exact Size: 13.06 x 11.05 x 3.49 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 4.20 carat natural black Onyx gem, 1 pc in oval shape with an exact size of 13.06 x 11.05 x 3.49 mm. This loose Onyx gemstone was mined in Sri Lanka and its clarity is Opaque.

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Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
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Good. I ts very user friendly.

Posted By Shalini in June, 2025
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Was a good experience.

Posted By Tim in July, 2025
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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.

Posted By RenoRose in January, 2026
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Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
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Overall Rating -> 10 star ratings

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
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