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Home Gemstones Onyx
4.31 ct Black Onyx Gemstone, Onyx Gem in Heart Rose-Cut Shape for Sale.
Photos are of Actual Product for Sale
4.31 ct Black Onyx Stone, Natural Onyx in Heart Rose-Cut Shape for Sale Onyx Gemstone in 10.4 x 10.3 mm Size for Sale, Onyx Stone in Black Color

4.31ct Natural Black Onyx, Heart Shape, 10.4x10.3 mm

9.7 out of 10
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Product ID: 669899
Type: Onyx
Weight: 4.31 ct 1 gem
Size: mm calibrated
Size: 10.4 x 10.3 x 4.9 mm
Exact Size: 10.44 x 10.34 x 4.94 mm
Length x Width x Depth
Shape: Heart Rose-Cut
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 1 pc
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$
4.29
Quantity
4 pieces available
Item in Stock
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Product Description

This is a 4.31 carat natural black Onyx gem, 1 pc in heart shape with an exact size of 10.44 x 10.34 x 4.94 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 purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate

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 -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
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Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

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

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
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Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate
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