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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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Onyx Price

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Black Onyx
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8.80ct Black Onyx, Pear Shape, Opaque

14.8 x 9.2 mm

$ 8.76

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9.56ctw Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.52

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8.89ctw Black Onyx, Heart, Opaque

10.5 x 10.5 mm

$ 8.86

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8.59ctw Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 8.56

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1.12ct Black Onyx, Round, Opaque

6.5 mm (calibrated)

$ 2.23

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8.57ctw Black Onyx, Heart, Opaque

10.4 x 10.4 mm

$ 8.53

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4.89ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.74

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22.03ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 21.95

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1.59ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 3.17

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4.46ct Black Onyx, Heart, Opaque

10.5 x 10.5 mm

$ 4.44

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3.11ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 6.19

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8.49ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.46

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4.50ct Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 4.48

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4.34ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 4.32

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8.57ctw Black Onyx, Heart, Opaque

10.5 x 10.5 mm

$ 8.53

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2.20ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.38

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11.14ct Black Onyx, Pear Shape, Opaque

17.8 x 10 mm

$ 11.10

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4.24ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 4.22

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4.19ct Black Onyx, Heart, Opaque

10.4 x 10.4 mm

$ 4.17

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10.04ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.00

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2.61ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.20

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8.66ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.62

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1.48ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 2.95

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5.80ct Black Onyx, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 4.81

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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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
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Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

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

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
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Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate
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