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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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For Example: 8-9
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Black Onyx
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2.36ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.70

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10.74ct Black Onyx, Pear Shape, Opaque

19.1 x 14.5 mm

$ 8.21

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2.69ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.36

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8.66ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.62

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20.38ct Black Onyx, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 20.30

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4.31ct Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 4.29

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10.40ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.36

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20.57ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 20.48

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33.29ct Black Onyx, Oval, Opaque

23.4 x 21.4 mm

$ 33.16

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8.56ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.52

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8.11ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 8.08

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1.48ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 2.95

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1.08ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 2.15

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8.90ctw Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 8.86

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21.82ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 21.73

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4.35ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 10.35

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4.89ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.74

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2.12ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.22

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8.38ctw Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 8.35

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10.32ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.28

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19.29ct Black Onyx, Oval, Opaque

25 x 18 mm (calibrated)

$ 38.43

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2.58ctw Black Onyx, Round, Opaque

6.5 mm (calibrated)

$ 5.14

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8.64ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.61

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2.43ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.84

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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

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
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Overall Rating -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate
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