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Home Gemstones Onyx

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

Onyx Weight
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Black Onyx
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10.14ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.10

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6.48ctw Black Onyx, Trillion, Opaque

9.9 x 9.4 mm

$ 6.46

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11.60ct Black Onyx, Pear Shape, Opaque

19.4 x 14.2 mm

$ 11.55

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9.32ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.28

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1.98ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 3.94

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2.33ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.64

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4.83ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.62

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4.26ct Black Onyx, Heart, Opaque

10.4 x 10.3 mm

$ 4.24

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3.07ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 6.12

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1.31ct Black Onyx, Round, Opaque

6.5 mm (calibrated)

$ 2.61

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10.38ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.34

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1.42ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 2.83

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3.27ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 6.52

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3.36ctw Black Onyx, Round, Opaque

7.5 mm (calibrated)

$ 6.69

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10.30ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.26

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3.90ct Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 3.88

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3.19ct Black Onyx, Trillion, Opaque

9.9 x 9.3 mm

$ 6.36

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1.59ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 3.17

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4.20ct Black Onyx, Heart, Opaque

10.4 x 10.3 mm

$ 4.18

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10.69ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.65

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10.99ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.95

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4.20ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 4.18

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4.16ct Black Onyx, Heart, Opaque

10.4 x 10.3 mm

$ 4.14

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4.12ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 4.10

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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 -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

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
Source: Bizrate
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