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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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1.61ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 3.20

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21.79ct Black Onyx, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 21.70

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3.10ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 6.18

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9.65ctw Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.61

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19.74ct Black Onyx, Oval, Opaque

25 x 18 mm (calibrated)

$ 39.33

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4.40ct Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 4.38

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8.77ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.73

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15.16ct Black Onyx, Pear Shape, Opaque

26.9 x 14.8 mm

$ 15.10

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10.14ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.10

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1.99ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 3.97

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11.43ct Black Onyx, Pear Shape, Opaque

19.1 x 14.5 mm

$ 11.39

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4.88ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.72

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2.89ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.76

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1.98ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 3.94

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4.36ct Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 4.34

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10.69ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.65

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20.01ct Black Onyx, Pear Shape, Opaque

24.8 x 15 mm

$ 19.93

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4.10ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 4.08

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2.10ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.18

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8.18ctw Black Onyx, Oval, Opaque

13 x 11 mm (calibrated)

$ 16.29

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9.19ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.15

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4.24ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 8.45

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2.86ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.69

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8.56ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.52

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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

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate
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