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
ID: 669490
Weight: 22.42ct
Size: 25 x 18 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 22.42
Item in Stock
More Options & Item Details
Add to Cart
ID: 669290
Weight: 32.30ct
Size: 25.6 mm
Clarity: Opaque
Content: 1 pc
Price: $ 38.76
Item in Stock
More Options & Item Details
Add to Cart
ID: 722400
Weight: 10.14ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 12.17
Item in Stock
More Options & Item Details
Add to Cart
ID: 687489
Weight: 1.37ct
Size: 7 mm (calibrated)
Clarity: Opaque
Price: $ 3.29
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 687656
Weight: 1.96ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 4.70
Item in Stock
More Options & Item Details
Add to Cart
ID: 673183
Weight: 8.25ct (total)
Size: 13 x 11 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 19.80
Item in Stock
More Options & Item Details
Add to Cart
ID: 687772
Weight: 2.19ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.26
Item in Stock
More Options & Item Details
Add to Cart
ID: 688437
Weight: 1.23ct
Size: 5.5 mm (calibrated)
Clarity: Opaque
Price: $ 2.95
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 669496
Weight: 26.89ct
Size: 30.2 x 20.5 mm
Clarity: Opaque
Content: 1 pc
Price: $ 32.27
Item in Stock
More Options & Item Details
Add to Cart
ID: 688345
Weight: 2.78ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 6.94
Item in Stock
More Options & Item Details
Add to Cart
ID: 721331
Weight: 4.31ct
Size: 10.5 x 10.3 mm
Clarity: Opaque
Content: 1 pc
Price: $ 5.17
Item in Stock
More Options & Item Details
Add to Cart
ID: 669221
Weight: 4.19ct
Size: 10.5 x 10.3 mm
Clarity: Opaque
Price: $ 5.03
Item in Stock
More Options & Item Details
Select pcs
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: 668251
Weight: 8.67ct (total)
Size: 10 x 10 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 10.40
Item in Stock
More Options & Item Details
Add to Cart
ID: 671953
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: 672936
Weight: 4.20ct
Size: 13 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 10.08
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 688182
Weight: 1.98ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 4.75
Item in Stock
More Options & Item Details
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: 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: 687557
Weight: 2.31ct (total)
Size: 6.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.54
Item in Stock
More Options & Item Details
Add to Cart
ID: 669133
Weight: 3.35ct
Size: 9.9 x 9.3 mm
Clarity: Opaque
Price: $ 4.02
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 722397
Weight: 10.51ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Price: $ 12.61
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 721788
Weight: 8.70ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 10.44
Item in Stock
More Options & Item Details
Add to Cart
ID: 722134
Weight: 20.57ct (total)
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 24.68
Item in Stock
More Options & Item Details
Add to Cart
ID: 669676
Weight: 8.51ct (total)
Size: 10 x 10 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 8.51
Item in Stock
More Options & Item Details
Add to Cart
ID: 722394
Weight: 4.35ct
Size: 10.5 x 10.3 mm
Clarity: Opaque
Content: 1 pc
Price: $ 5.22
Item in Stock
More Options & Item Details
Add to Cart
ID: 669434
Weight: 8.49ct (total)
Size: 10.5 x 10.3 mm
Clarity: Opaque
Content: 2 pcs
Price: $ 10.19
Item in Stock
More Options & Item Details
Add to Cart
ID: 721603
Weight: 9.16ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 10.99
Item in Stock
More Options & Item Details
Add to Cart
ID: 687652
Weight: 2.05ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 4.92
Item in Stock
More Options & Item Details
Add to Cart
ID: 721381
Weight: 10.69ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Price: $ 12.83
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 668258
Weight: 9.56ct (total)
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 11.47
Item in Stock
More Options & Item Details
Add to Cart
ID: 672130
Weight: 4.83ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 11.59
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 687944
Weight: 1.12ct
Size: 6.5 mm (calibrated)
Clarity: Opaque
Price: $ 2.69
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 688185
Weight: 1.96ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 4.70
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: 672028
Weight: 19.29ct
Size: 25 x 18 mm (calibrated)
Clarity: Opaque
Price: $ 46.30
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: 721547
Weight: 8.66ct (total)
Size: 10.5 x 10.4 mm
Clarity: Opaque
Content: 2 pcs
Price: $ 10.39
Item in Stock
More Options & Item Details
Add to Cart
ID: 687659
Weight: 2.24ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.38
Item in Stock
More Options & Item Details
Add to Cart
ID: 669125
Weight: 3.16ct
Size: 9.8 x 9.3 mm
Clarity: Opaque
Price: $ 3.79
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 721332
Weight: 4.46ct
Size: 10.5 x 10.3 mm
Clarity: Opaque
Content: 1 pc
Price: $ 5.35
Item in Stock
More Options & Item Details
Add to Cart
ID: 669216
Weight: 4.38ct
Size: 10.4 x 10.4 mm
Clarity: Opaque
Price: $ 5.26
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 668249
Weight: 8.54ct (total)
Size: 10 x 10 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 10.25
Item in Stock
More Options & Item Details
Add to Cart
ID: 722390
Weight: 9.35ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 11.22
Item in Stock
More Options & Item Details
Add to Cart
ID: 722393
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: 672229
Weight: 4.70ct
Size: 11 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 11.28
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 687945
Weight: 1.24ct
Size: 6.5 mm (calibrated)
Clarity: Opaque
Price: $ 2.98
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 672932
Weight: 3.97ct
Size: 13 x 11 mm (calibrated)
Clarity: Opaque
Price: $ 9.53
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 668866
Weight: 3.35ct
Size: 9.9 x 9.3 mm
Clarity: Opaque
Price: $ 4.02
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 722388
Weight: 10.59ct
Size: 18 x 13 mm (calibrated)
Clarity: Opaque
Price: $ 12.71
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 672023
Weight: 19.31ct
Size: 25 x 18 mm (calibrated)
Clarity: Opaque
Price: $ 46.34
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 687549
Weight: 2.24ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.38
Item in Stock
More Options & Item Details
Add to Cart
ID: 672896
Weight: 20.88ct
Size: 22.1 x 15.8 mm
Clarity: Opaque
Content: 1 pc
Price: $ 112.75
Item in Stock
More Options & Item Details
Add to Cart
ID: 688034
Weight: 2.61ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 6.26
Item in Stock
More Options & Item Details
Add to Cart
ID: 672033
Weight: 19.82ct
Size: 25 x 18 mm (calibrated)
Clarity: Opaque
Price: $ 47.57
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 687498
Weight: 1.58ct
Size: 7 mm (calibrated)
Clarity: Opaque
Price: $ 3.79
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 687833
Weight: 2.93ct (total)
Size: 7 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 7.03
Item in Stock
More Options & Item Details
Add to Cart
ID: 688180
Weight: 2.10ct (total)
Size: 5.5 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 5.04
Item in Stock
More Options & Item Details
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: 669106
Weight: 6.48ct (total)
Size: 9.9 x 9.4 mm
Clarity: Opaque
Content: 2 pcs
Price: $ 7.78
Item in Stock
More Options & Item Details
Add to Cart
1 - 6

Why Buy Black 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

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

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

Overall Rating -> 10 star ratings

So far So good

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

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

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