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4.10 ct Black Onyx Gemstone, Onyx Gem in Heart Cabochon Shape for Sale.
Photos are of Actual Product for Sale
4.10 ct Black Onyx Stone, Natural Onyx in Heart Cabochon Shape for Sale Onyx Gemstone in 10 x 10 mm (calibrated) Size for Sale, Onyx Stone in Black Color

4.10ct Natural Black Onyx, Heart Shape, 10.1x10.1 mm

9.6 out of 10
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Product ID: 669135
Type: Onyx
Weight: 4.10 ct 1 gem
Size: 10 x 10 mm calibrated
Size: 10.1 x 10.1 x 5.4 mm
Exact Size: 10.11 x 10.07 x 5.43 mm
Length x Width x Depth
Shape: Heart Cabochon
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 1 pc
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$
4.92
Quantity
3 pieces available
Item in Stock
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Product Description

This is a 4.10 carat natural black Onyx gem, 1 pc in heart shape with an exact size of 10.11 x 10.07 x 5.43 mm. This loose Onyx gemstone was mined in Sri Lanka and its clarity is Opaque.

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Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

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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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Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 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.

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

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
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