X
Gemstone Search

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

Buy Black Onyx Gems

Black Onyx Weight
Black Onyx Size
Black Onyx Clarity
Black Onyx Price

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color
Black Black Onyx
Blue
Brown
Golden
Gray
Green
Multicolor
Orange
Pink
Purple
Red
Turquoise
Violet
White
Yellow
Single
Pairs
Lots
Faceted
Cabochons
X
Clear All
  • Actual Product Photos
  • Reliable Quality
  • Full Transparency
  • Large Selection
  • Affordable Prices
  • Fast, Secure Global Shipping
ID: 722391
Weight: 13.39ct
Size: 18.3 x 14.1 mm
Clarity: Opaque
Content: 1 pc
Price: $ 16.07
Item in Stock
More Options & Item Details
Add to Cart
ID: 673173
Weight: 8.01ct (total)
Size: 13 x 11 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 19.22
Item in Stock
More Options & Item Details
Add to Cart
ID: 669536
Weight: 19.24ct
Size: 24.9 x 16.9 mm
Clarity: Opaque
Content: 1 pc
Price: $ 23.09
Item in Stock
More Options & Item Details
Add to Cart
ID: 722389
Weight: 9.50ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Price: $ 11.40
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 668905
Weight: 6.79ct (total)
Size: 9.9 x 9.4 mm
Clarity: Opaque
Content: 2 pcs
Price: $ 6.79
Item in Stock
More Options & Item Details
Add to Cart
ID: 671957
Weight: 4.88ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 11.71
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 672034
Weight: 19.53ct
Size: 25 x 18 mm (calibrated)
Clarity: Opaque
Price: $ 46.87
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 671958
Weight: 4.77ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 11.45
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 687492
Weight: 1.59ct
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 3.82
Item in Stock
More Options & Item Details
Add to Cart
ID: 722396
Weight: 4.50ct
Size: 10.5 x 10.4 mm
Clarity: Opaque
Content: 1 pc
Price: $ 5.40
Item in Stock
More Options & Item Details
Add to Cart
ID: 721607
Weight: 10.44ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 12.53
Item in Stock
More Options & Item Details
Add to Cart
ID: 687661
Weight: 2.06ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 4.94
Item in Stock
More Options & Item Details
Add to Cart
ID: 671962
Weight: 4.85ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 11.64
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 669124
Weight: 3.30ct
Size: 9.9 x 9.4 mm
Clarity: Opaque
Price: $ 3.96
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 672139
Weight: 4.66ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 11.18
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 721386
Weight: 9.80ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 11.76
Item in Stock
More Options & Item Details
Add to Cart
ID: 673182
Weight: 8.12ct (total)
Size: 13 x 11 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 19.49
Item in Stock
More Options & Item Details
Add to Cart
ID: 687837
Weight: 2.64ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 6.34
Item in Stock
More Options & Item Details
Add to Cart
ID: 721337
Weight: 4.20ct
Size: 10 x 10 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 5.04
Item in Stock
More Options & Item Details
Add to Cart
ID: 688340
Weight: 2.96ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 7.10
Item in Stock
More Options & Item Details
Add to Cart
ID: 722386
Weight: 12.67ct
Size: 18.5 x 13.9 mm
Clarity: Opaque
Content: 1 pc
Price: $ 15.20
Item in Stock
More Options & Item Details
Add to Cart
ID: 687842
Weight: 2.65ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 6.36
Item in Stock
More Options & Item Details
Add to Cart
ID: 686805
Weight: 2.93ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.86
Item in Stock
More Options & Item Details
Add to Cart
ID: 687839
Weight: 3.11ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 7.46
Item in Stock
More Options & Item Details
Add to Cart
ID: 687558
Weight: 2.41ct (total)
Size: 6.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.78
Item in Stock
More Options & Item Details
Add to Cart
ID: 671961
Weight: 4.89ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 11.74
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 688435
Weight: 1.20ct
Size: 5.5 mm (calibrated)
Clarity: Opaque
Price: $ 2.88
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 688032
Weight: 2.69ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 6.46
Item in Stock
More Options & Item Details
Add to Cart
ID: 672140
Weight: 4.85ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 11.64
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 668329
Weight: 4.74ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 5.69
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 669542
Weight: 28.87ct
Size: 27 x 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 34.64
Item in Stock
More Options & Item Details
Add to Cart
ID: 688460
Weight: 2.43ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.83
Item in Stock
More Options & Item Details
Add to Cart
ID: 721550
Weight: 8.43ct (total)
Size: 10.4 x 10.4 mm
Clarity: Opaque
Content: 2 pcs
Price: $ 10.12
Item in Stock
More Options & Item Details
Add to Cart
ID: 669224
Weight: 4.35ct
Size: 10.5 x 10.4 mm
Clarity: Opaque
Price: $ 5.22
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 688459
Weight: 2.32ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.57
Item in Stock
More Options & Item Details
Add to Cart
ID: 722139
Weight: 21.54ct (total)
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 25.85
Item in Stock
More Options & Item Details
Add to Cart
ID: 687500
Weight: 1.63ct
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 3.91
Item in Stock
More Options & Item Details
Add to Cart
ID: 687783
Weight: 2.31ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.54
Item in Stock
More Options & Item Details
Add to Cart
ID: 669900
Weight: 4.36ct
Size: 10.5 x 10.3 mm
Clarity: Opaque
Price: $ 5.23
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
1 2 3
...
6
1 - 6

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

Site is easy to navigate and the variety is great and how often new products are added is also great.

Posted By Jhidron in March, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have bought from you before and have found your gems exceed my expectations. I have been very satisfied with all gems sent to me. I will be back. Thanks....

Posted By Dork in September, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent selection and easy to use, well done site

Posted By Steph in December, 2024
Source: Bizrate

Overall Rating -> 9 star ratings

I wish there were options for jewelry settings

Posted By Tim in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Site is easy to navigate - details on cut, polish, and finish work and techniques were helpful. 3d view or wireframe diagram of stones would be nice.

Posted By Tb in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

This was a great time as always. The only problem I had was deciding between all the beautiful and affordable stones that met my requirements. I love shopping for sapphires!

Posted By Phoenix in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I have been buying gems for several years off and on and love their selection and great low prices. I started out wanting to get an example of each type of gem but after looking at all the types of gems and reading about them I realize it is almost impossible for me to do. It took me years just to read about them all. Gem Select is the best gem site you can find. For information or to buy. Steve M.

Posted By Stevee M. in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good Hoping you will increase your inventory especially in the 6mmThanks

Posted By Ibie in February, 2025
Source: Bizrate
Enlarged Gemstone Image