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8.63 ctw Black Onyx Gemstones, Onyx Gems in Heart Cabochon Shape for Sale.
Photos are of Actual Products for Sale
8.63 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

8.63ct Natural Black Onyx, Heart Shape, 10.2x10.1 mm

9.6 out of 10
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Onyx Product ID: 669107
Type: Onyx
Onyx Weight: 8.63 ct (total) Onyx 2 gems
avg. 4.32 ct
Onyx Size: 10 x 10 mm calibrated Onyx
Onyx Size: 10.2 x 10.1 x 5.4 mm Onyx
Onyx Exact Size: 10.15 x 10.14 x 5.42 mm
Length x Width x Depth
Onyx Shape: Heart Cabochon Onyx
Onyx Color: Black Onyx
Onyx Clarity: Opaque Onyx
Onyx Treatment: Dyed
Onyx Origin: Sri Lanka Onyx
Content: 2 pcs
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  • Natural certified gemstones

    Gemstone Laboratories
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  • 30-day risk free return policy

$
10.36
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Product Description

These are 8.63 carat natural black Onyx gems, 2 pcs in heart shape with an exact size of 10.15 x 10.14 x 5.42 mm. These loose Onyx gemstones were mined in Sri Lanka and their clarity is Opaque.

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GemSelect Certified Store Reviews

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Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

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It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
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My experience was done with ease

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

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

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

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
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