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Home Gemstones Onyx
4.35 ct Black Onyx Gemstone, Onyx Gem in Heart Checkerboard Shape for Sale.
Photos are of Actual Product for Sale
4.35 ct Black Onyx Stone, Natural Onyx in Heart Checkerboard Shape for Sale Onyx Gemstone in 10.5 x 10.3 mm Size for Sale, Onyx Stone in Black Color

4.35ct Natural Black Onyx, Heart Shape, 10.5x10.3 mm

9.7 out of 10
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Product ID: 722394
Type: Onyx
Weight: 4.35 ct 1 gem
Size: mm calibrated
Size: 10.5 x 10.3 x 5.1 mm
Exact Size: 10.45 x 10.33 x 5.05 mm
Length x Width x Depth
Shape: Heart Checkerboard
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 1 pc
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Product Description

This is a 4.35 carat natural black Onyx gem, 1 pc in heart shape with an exact size of 10.45 x 10.33 x 5.05 mm. This loose Onyx gemstone was mined in Sri Lanka and its clarity is Opaque.

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Overall Rating -> 8 star ratings

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
Source: Bizrate

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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Overall Rating -> 8 star ratings

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

Posted By Jon in December, 2025
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Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

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

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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Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
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