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

4.36ct Natural Black Onyx, Heart Shape, 10.5x10.3 mm

9.7 out of 10
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Product ID: 669900
Type: Onyx
Weight: 4.36 ct 1 gem
Size: mm calibrated
Size: 10.5 x 10.3 x 5.1 mm
Exact Size: 10.45 x 10.30 x 5.07 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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$
4.34
Quantity
6 pieces available
Item in Stock
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Product Description

This is a 4.36 carat natural black Onyx gem, 1 pc in heart shape with an exact size of 10.45 x 10.30 x 5.07 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

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
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Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
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Overall Rating -> 10 star ratings

The website was very easy to use.

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

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac 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
Source: Bizrate
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Enlarged Gemstone Image