Buy Black Onyx Gems
Bi-color
Black Black Onyx
Blue
Brown
Golden
Gray
Green
Multicolor
Orange
Pink
Purple
Red
Turquoise
Violet
White
Yellow
Clear Colors
Single
Pairs
Lots
Faceted
Cabochons
Showing results for
Sort By:
Price - High to Low
Price - Low to High
Size - Largest to Smallest
Size - Smallest to Largest
Weight - High to Low
Weight - Low to High
Gemtypes in Category:
Onyx (295)
X
Clear All
ID:
688342
Weight:
3.14
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
7.54
Item in Stock
More Options & Item Details
ID:
687832
Weight:
2.86
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
6.86
Item in Stock
More Options & Item Details
ID:
721330
Weight:
4.46
Size:
10.5 x 10.5 mm
Clarity:
Opaque
Price:
$
5.35
Item in Stock
More Options & Item Details
ID:
722136
Weight:
21.71
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
26.05
Item in Stock
More Options & Item Details
ID:
722405
Weight:
9.38
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
11.26
Item in Stock
More Options & Item Details
ID:
686808
Weight:
3.10
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
7.44
Item in Stock
More Options & Item Details
ID:
669491
Weight:
21.79
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
26.15
Item in Stock
More Options & Item Details
ID:
687782
Weight:
2.13
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.11
Item in Stock
More Options & Item Details
ID:
722400
Weight:
10.14
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
12.17
Item in Stock
More Options & Item Details
ID:
721545
Weight:
8.42
Size:
10.4 x 10.3 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.10
Item in Stock
More Options & Item Details
ID:
722134
Weight:
20.57
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
24.68
Item in Stock
More Options & Item Details
ID:
687557
Weight:
2.31
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.54
Item in Stock
More Options & Item Details
ID:
688339
Weight:
2.84
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.68
Item in Stock
More Options & Item Details
ID:
669134
Weight:
4.24
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Price:
$
5.09
Item in Stock
More Options & Item Details
Select
1
2
3
pcs 0 in Cart
ID:
722389
Weight:
9.50
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
11.40
Item in Stock
More Options & Item Details
ID:
722402
Weight:
10.99
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
13.19
Item in Stock
More Options & Item Details
ID:
721602
Weight:
10.11
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
12.13
Item in Stock
More Options & Item Details
ID:
687652
Weight:
2.05
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.92
Item in Stock
More Options & Item Details
ID:
687551
Weight:
2.17
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.21
Item in Stock
More Options & Item Details
ID:
688185
Weight:
1.96
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.70
Item in Stock
More Options & Item Details
ID:
687493
Weight:
1.48
Size:
7 mm (calibrated)
Clarity:
Opaque
Price:
$
3.55
Item in Stock
More Options & Item Details
ID:
669295
Weight:
33.29
Size:
23.4 x 21.4 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
39.95
Item in Stock
More Options & Item Details
ID:
722133
Weight:
22.32
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
26.78
Item in Stock
More Options & Item Details
ID:
722131
Weight:
21.42
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
25.70
Item in Stock
More Options & Item Details
ID:
672028
Weight:
19.29
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
46.30
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
669895
Weight:
4.20
Size:
10.4 x 10.3 mm
Clarity:
Opaque
Price:
$
5.04
Item in Stock
More Options & Item Details
Select
1
2
3
4
5
6
pcs 0 in Cart
ID:
687555
Weight:
2.48
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.95
Item in Stock
More Options & Item Details
ID:
672130
Weight:
4.83
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
11.59
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
688175
Weight:
2.04
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.90
Item in Stock
More Options & Item Details
ID:
668090
Weight:
8.41
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.09
Item in Stock
More Options & Item Details
ID:
672034
Weight:
19.53
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
46.87
Item in Stock
More Options & Item Details
Select
1
2
3
4
5
pcs 0 in Cart
ID:
669497
Weight:
20.38
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
24.46
Item in Stock
More Options & Item Details
ID:
669131
Weight:
4.24
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Price:
$
5.09
Item in Stock
More Options & Item Details
Select
1
2
3
pcs 0 in Cart
ID:
669537
Weight:
20.01
Size:
24.8 x 15 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
24.01
Item in Stock
More Options & Item Details
ID:
669216
Weight:
4.38
Size:
10.4 x 10.4 mm
Clarity:
Opaque
Price:
$
5.26
Item in Stock
More Options & Item Details
Select
1
2
3
4
5
pcs 0 in Cart
ID:
673304
Weight:
12.12
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
29.09
Item in Stock
More Options & Item Details
ID:
669132
Weight:
11.43
Size:
19.1 x 14.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
13.72
Item in Stock
More Options & Item Details
ID:
672136
Weight:
4.54
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
10.90
Item in Stock
More Options & Item Details
Select
1
2
3
4
5
pcs 0 in Cart
ID:
722408
Weight:
10.38
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
12.46
Item in Stock
More Options & Item Details
ID:
687659
Weight:
2.24
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.38
Item in Stock
More Options & Item Details
ID:
687945
Weight:
1.24
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.98
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
668910
Weight:
9.62
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
11.54
Item in Stock
More Options & Item Details
ID:
688338
Weight:
3.11
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
7.46
Item in Stock
More Options & Item Details
ID:
671958
Weight:
4.77
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
11.45
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
687772
Weight:
2.19
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.26
Item in Stock
More Options & Item Details
ID:
668093
Weight:
8.66
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.39
Item in Stock
More Options & Item Details
ID:
672030
Weight:
19.58
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
46.99
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
687779
Weight:
2.17
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.21
Item in Stock
More Options & Item Details
ID:
721607
Weight:
10.44
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
12.53
Item in Stock
More Options & Item Details
ID:
721381
Weight:
10.69
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
12.83
Item in Stock
More Options & Item Details
ID:
669291
Weight:
26.38
Size:
23.1 x 18 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
31.66
Item in Stock
More Options & Item Details
ID:
688034
Weight:
2.61
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
6.26
Item in Stock
More Options & Item Details
ID:
721339
Weight:
4.19
Size:
10.4 x 10.3 mm
Clarity:
Opaque
Price:
$
5.03
Item in Stock
More Options & Item Details
Select
1
2
3
pcs 0 in Cart
ID:
672027
Weight:
19.41
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
46.58
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
721792
Weight:
8.11
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
9.73
Item in Stock
More Options & Item Details
ID:
721543
Weight:
8.52
Size:
10.5 x 10.4 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.22
Item in Stock
More Options & Item Details
ID:
669679
Weight:
8.50
Size:
10.4 x 10.4 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.20
Item in Stock
More Options & Item Details
ID:
688437
Weight:
1.23
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.95
Item in Stock
More Options & Item Details
ID:
687775
Weight:
1.99
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.78
Item in Stock
More Options & Item Details
ID:
687656
Weight:
1.96
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.70
Item in Stock
More Options & Item Details
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
The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.
Posted By SLIntuitive Donna in July, 2025
Source: Bizrate
Overall Rating -> 9
Nothing bad to report. Everything is as expected. The gems and the price are all very good.
Posted By Dafanatic in August, 2025
Source: Bizrate
Overall Rating -> 8
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
Overall Rating -> 10
Filters need to be improved but rest of website is great
Posted By Rock hound in December, 2025
Source: Bizrate
Overall Rating -> 10
Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones
Posted By Edsor works in October, 2025
Source: Bizrate
Overall Rating -> 9
The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.
Posted By Guero in March, 2026
Source: Bizrate