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Home Gemstones Onyx
2.58 ctw Black Onyx Gemstones, Onyx Gems in Round Cabochon Shape for Sale.
Photos are of Actual Products for Sale
2.58 ctw Black Onyx Stones, Natural Onyx in Round Cabochon Shape for Sale Onyx Gemstones in 6.5 mm (calibrated) Size for Sale, Onyx Stones in Black Color

2.58ct Natural Black Onyx, Round Cut, 6.43 mm

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Product ID: 688024
Type: Onyx
Weight: 2.58 ct (total) 2 gems
avg. 1.29 ct
Size: 6.5 mm calibrated
Size: 6.4 mm
Exact Size: 6.43 x 4.08 mm
Diameter x Depth
Shape: Round Cabochon
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 2 pcs
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Product Description

These are 2.58 carat natural black Onyx gems, 2 pcs in round shape with an exact size of 6.43 mm x 4.08 mm (avg.). These loose Onyx gemstones were mined in Sri Lanka and their clarity is Opaque.

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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'

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Posted By Tim in July, 2025
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All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
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Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

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Overall Rating -> 9 star ratings

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