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Home Gemstones Onyx
8.42 ctw Black Onyx Gemstones, Onyx Gems in Heart Rose-Cut Shape for Sale.
Photos are of Actual Products for Sale
8.42 ctw Black Onyx Stones, Natural Onyx in Heart Rose-Cut Shape for Sale Onyx Gemstones in 10.4 x 10.3 mm Size for Sale, Onyx Stones in Black Color

8.42ct Natural Black Onyx, Heart Shape, 10.4x10.3 mm

9.7 out of 10
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Product ID: 721545
Type: Onyx
Weight: 8.42 ct (total) 2 gems
avg. 4.21 ct
Size: mm calibrated
Size: 10.4 x 10.3 x 5 mm
Exact Size: 10.41 x 10.27 x 5.03 mm
Length x Width x Depth
Shape: Heart Rose-Cut
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 2 pcs
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$
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Product Description

These are 8.42 carat natural black Onyx gems, 2 pcs in heart shape with an exact size of 10.41 x 10.27 x 5.03 mm. These loose Onyx gemstones were mined in Sri Lanka and their clarity is Opaque.

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Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 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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It was all good

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Was a good experience.

Posted By Tim in July, 2025
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Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
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