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

6.69ctw Black Onyx, Trillion, Opaque

9.9 x 9.4 mm

$ 6.66

View Gem

3.20ctw Black Onyx, Round, Opaque

7 mm (calibrated)

$ 6.37

View Gem

17.51ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 17.44

View Gem

4.06ct Black Onyx, Oval, Opaque

13 x 11 mm (calibrated)

$ 8.08

View Gem

2.58ctw Black Onyx, Round, Opaque

6.5 mm (calibrated)

$ 5.14

View Gem

21.54ctw Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 21.46

View Gem

8.07ctw Black Onyx, Oval, Opaque

13 x 11 mm (calibrated)

$ 16.08

View Gem

8.51ctw Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 7.06

View Gem

9.97ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.93

View Gem

4.16ct Black Onyx, Heart, Opaque

10.4 x 10.3 mm

$ 4.14

View Gem

9.80ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.76

View Gem

1.31ct Black Onyx, Round, Opaque

6.5 mm (calibrated)

$ 2.61

View Gem

19.29ct Black Onyx, Oval, Opaque

25 x 18 mm (calibrated)

$ 38.43

View Gem

4.22ct Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 4.20

View Gem

6.53ctw Black Onyx, Trillion, Opaque

9.9 x 9.4 mm

$ 6.51

View Gem

9.31ct Black Onyx, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 9.27

View Gem

1.58ct Black Onyx, Round, Opaque

7 mm (calibrated)

$ 3.15

View Gem

4.70ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.36

View Gem

2.05ctw Black Onyx, Round, Opaque

5.5 mm (calibrated)

$ 4.08

View Gem

4.70ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.36

View Gem

4.85ct Black Onyx, Cushion, Opaque

11 x 11 mm (calibrated)

$ 9.66

View Gem

8.66ctw Black Onyx, Heart, Opaque

10 x 10 mm (calibrated)

$ 8.62

View Gem

1.03ct Black Onyx, Round, Opaque

6.5 mm (calibrated)

$ 2.05

View Gem

8.31ctw Black Onyx, Heart, Opaque

10.4 x 10.4 mm

$ 8.28

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 -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate
Enlarged Gemstone Image