90,000+Happy Customers
20+Years
WorldwideShipping
Cart
Free Report Included
Worldwide Shipping
30 Day Returns
Help Center Shipping Payment and Checkout Returns Certificates Contact Us
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

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color
Black Onyx
Blue
Brown
Golden
Gray
Green
Multicolor
Orange
Pink
Purple
Red
Turquoise
Violet
White
Yellow
Single
Pairs
Lots
Faceted
Cabochons
Clear All

32.30ct Black Onyx, Round, Opaque

25.6 mm

$ 32.17

View Gem

22.42ct Black Onyx, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 18.61

View Gem

3.11ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 6.19

View Gem

8.89ctw Black Onyx, Heart, Opaque

10.5 x 10.5 mm

$ 8.86

View Gem

8.25ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 8.22

View Gem

4.92ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.80

View Gem

2.86ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.69

View Gem

8.66ctw Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 8.62

View Gem

9.68ctw Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.64

View Gem

4.24ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 4.22

View Gem

8.80ct Black Onyx, Pear Shape, Opaque

14.8 x 9.2 mm

$ 8.76

View Gem

16.43ct Black Onyx, Oval, Opaque

21.9 x 18.7 mm

$ 32.73

View Gem

10.69ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.65

View Gem

17.54ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 17.47

View Gem

4.46ct Black Onyx, Heart, Opaque

10.5 x 10.5 mm

$ 4.44

View Gem

2.90ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 5.78

View Gem

8.56ctw Black Onyx, Heart, Opaque

10.5 x 10.3 mm

$ 8.52

View Gem

8.69ctw Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 8.66

View Gem

15.16ct Black Onyx, Pear Shape, Opaque

26.9 x 14.8 mm

$ 15.10

View Gem

8.61ctw Black Onyx, Heart, Opaque

10.5 x 10.4 mm

$ 8.57

View Gem

24.74ct Black Onyx, Oval, Opaque

25.7 x 19.6 mm

$ 24.64

View Gem

19.31ct Black Onyx, Oval, Opaque

25 x 18 mm (calibrated)

$ 38.46

View Gem

9.65ctw Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.61

View Gem

10.11ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 10.07

View Gem

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 -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
Enlarged Gemstone Image