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Home Gemstones Onyx
8.41 ctw Black Onyx Gemstones, Onyx Gems in Heart Cabochon Shape for Sale.
Photos are of Actual Products for Sale
8.41 ctw Black Onyx Stones, Natural Onyx in Heart Cabochon Shape for Sale Onyx Gemstones in 10 x 10 mm (calibrated) Size for Sale, Onyx Stones in Black Color

8.41ct Natural Black Onyx, Heart Shape, 10.1x10 mm

9.7 out of 10
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Product ID: 668090
Type: Onyx
Weight: 8.41 ct (total) 2 gems
avg. 4.21 ct
Size: 10 x 10 mm calibrated
Size: 10.1 x 10 x 5.4 mm
Exact Size: 10.13 x 9.98 x 5.43 mm
Length x Width x Depth
Shape: Heart Cabochon
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 2 pcs
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Product Description

These are 8.41 carat natural black Onyx gems, 2 pcs in heart shape with an exact size of 10.13 x 9.98 x 5.43 mm. These loose Onyx gemstones were mined in Sri Lanka and their clarity is Opaque.

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Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
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Easy and good price

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It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
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GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
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I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
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Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
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