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Home Gemstones Onyx

Loose Onyx Gemstones: Black Onyx, White Onyx and Banded Onyx for Jewelry | Onyx Carvings

Onyx Weight
Onyx Size
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32.30ct Black Onyx, Round, Opaque

25.6 mm

$ 32.17

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22.42ct Black Onyx, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 18.61

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10.50ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.46

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3.90ct Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 3.88

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9.47ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.43

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26.89ct Black Onyx, Pear Shape, Opaque

30.2 x 20.5 mm

$ 26.78

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20.03ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 19.95

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8.67ctw Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 8.63

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9.32ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.28

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9.47ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.43

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19.41ct Black Onyx, Oval, Opaque

25 x 18 mm (calibrated)

$ 38.66

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8.25ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 8.22

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10.07ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.03

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4.70ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.36

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12.67ct Black Onyx, Pear Shape, Opaque

18.5 x 13.9 mm

$ 12.62

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8.42ctw Black Onyx, Heart, Opaque

10.4 x 10.3 mm

$ 8.38

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1.98ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 3.94

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10.40ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.36

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2.17ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.32

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17.76ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 17.69

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1.43ct Black Onyx, Round, Opaque

6.5 mm (calibrated)

$ 2.85

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8.69ctw Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 8.66

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8.61ctw Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 8.57

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10.32ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.28

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Why Buy Onyx from GemSelect?

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

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
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
Enlarged Gemstone Image