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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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Black Onyx
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21.42ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 21.33

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2.94ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.86

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9.50ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.46

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8.89ctw Black Onyx, Heart, Opaque

10.5 x 10.5 mm

$ 8.86

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4.89ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.74

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8.49ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.46

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10.51ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.47

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2.83ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.64

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8.50ctw Black Onyx, Heart, Opaque

10.4 x 10.4 mm

$ 8.47

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8.70ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 8.67

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2.89ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.76

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9.31ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.27

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10.04ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.00

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4.66ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.28

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10.04ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.00

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1.98ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 3.94

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17.54ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 17.47

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8.59ctw Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 8.56

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2.19ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.37

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12.30ct Black Onyx, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 24.50

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8.77ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.73

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21.79ct Black Onyx, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 21.70

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6.79ctw Black Onyx, Trillion, Opaque

9.9 x 9.4 mm

$ 5.64

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10.11ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.07

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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 feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
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Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
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Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
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Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
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Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
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