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Home Gemstones Onyx
8.50 ctw Black Onyx Gemstones, Onyx Gems in Heart Rose-Cut Shape for Sale.
Photos are of Actual Products for Sale
8.50 ctw Black Onyx Stones, Natural Onyx in Heart Rose-Cut Shape for Sale Onyx Gemstones in 10.5 x 10.4 mm Size for Sale, Onyx Stones in Black Color

8.50ct Natural Black Onyx, Heart Shape, 10.5x10.4 mm

9.7 out of 10
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Product ID: 721540
Type: Onyx
Weight: 8.50 ct (total) 2 gems
avg. 4.25 ct
Size: mm calibrated
Size: 10.5 x 10.4 x 4.9 mm
Exact Size: 10.45 x 10.40 x 4.88 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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Product Description

These are 8.50 carat natural black Onyx gems, 2 pcs in heart shape with an exact size of 10.45 x 10.40 x 4.88 mm. These loose Onyx gemstones were mined in Sri Lanka and their clarity is Opaque.

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Overall Rating -> 10 star ratings

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Posted By Curt's Cabochons in June, 2025
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Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

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

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

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

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Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
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