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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
Onyx Clarity
Onyx Price

Size Explained

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For Example: 8-9
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Black Onyx
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2.93ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 4.86

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16.58ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 16.52

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9.16ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.12

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16.43ct Black Onyx, Oval, Opaque

21.9 x 18.7 mm

$ 32.73

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2.11ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.20

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1.78ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 3.54

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4.36ct Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 4.34

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17.01ct Black Onyx, Pear Shape, Opaque

21.8 x 17.8 mm

$ 17.03

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4.40ct Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 4.38

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11.14ct Black Onyx, Pear Shape, Opaque

17.8 x 10 mm

$ 11.10

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10.00ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.96

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8.57ctw Black Onyx, Heart, Opaque

10.4 x 10.4 mm

$ 8.53

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4.74ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.45

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2.17ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.32

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9.48ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.45

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8.57ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.53

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2.06ctw Black Onyx, Round, Opaque

6.5 mm (calibrated)

$ 4.10

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1.63ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 3.25

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12.67ct Black Onyx, Pear Shape, Opaque

18.5 x 13.9 mm

$ 12.62

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4.24ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 4.22

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8.67ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 7.20

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11.38ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 11.34

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22.32ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 22.23

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4.31ct Black Onyx, Heart, Opaque

10.4 x 10.3 mm

$ 4.29

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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

So far So good

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

Overall Rating -> 8 star ratings

It was fine

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

Excellent options

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

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

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

Good prices

Posted By TRM in October, 2025
Source: Bizrate
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