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 (323)
X
Clear All
ID:
673307
Weight:
23.37ct
Size:
22.1 x 16 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
126.20
Item in Stock
More Options & Item Details
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
ID:
671951
Weight:
4.94ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
9.88
Item in Stock
More Options & Item Details
ID:
669290
Weight:
32.30ct
Size:
25.6 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
38.76
Item in Stock
More Options & Item Details
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
ID:
687944
Weight:
1.12ct
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.69
Item in Stock
More Options & Item Details
Select
1
2
3
4
5
pcs 0 in Cart
ID:
669537
Weight:
20.01ct
Size:
24.8 x 15 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
24.01
Item in Stock
More Options & Item Details
ID:
669216
Weight:
4.38ct
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:
669107
Weight:
8.63ct (total)
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.36
Item in Stock
More Options & Item Details
ID:
669132
Weight:
11.43ct
Size:
19.1 x 14.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
13.72
Item in Stock
More Options & Item Details
ID:
687489
Weight:
1.37ct
Size:
7 mm (calibrated)
Clarity:
Opaque
Price:
$
3.29
Item in Stock
More Options & Item Details
Select
1
2
3
pcs 0 in Cart
ID:
669677
Weight:
8.77ct (total)
Size:
10.5 x 10.3 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.52
Item in Stock
More Options & Item Details
ID:
673637
Weight:
2.38ct (total)
Size:
7.2 x 5.2 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.76
Item in Stock
More Options & Item Details
ID:
672030
Weight:
19.58ct
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:
721551
Weight:
8.82ct (total)
Size:
10.5 x 10.4 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.58
Item in Stock
More Options & Item Details
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
1
2
3
4
pcs 0 in Cart
ID:
687841
Weight:
3.36ct (total)
Size:
7.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
8.06
Item in Stock
More Options & Item Details
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
ID:
672033
Weight:
19.82ct
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
47.57
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
668334
Weight:
4.81ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
5.77
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in 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
1
2
3
4
5
pcs 0 in 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
1
2
3
pcs 0 in Cart
ID:
687782
Weight:
2.13ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.11
Item in Stock
More Options & Item Details
ID:
721338
Weight:
4.33ct
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Price:
$
5.20
Item in Stock
More Options & Item Details
Select
1
2
3
4
5
pcs 0 in 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
1
2
3
4
5
pcs 0 in Cart
ID:
687942
Weight:
1.16ct
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.78
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in 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
1
2
3
pcs 0 in Cart
ID:
688343
Weight:
2.90ct (total)
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
6.96
Item in Stock
More Options & Item Details
ID:
722404
Weight:
11.28ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
13.54
Item in Stock
More Options & Item Details
ID:
721795
Weight:
10.05ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
12.06
Item in Stock
More Options & Item Details
ID:
721544
Weight:
8.66ct (total)
Size:
10.5 x 10.3 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.39
Item in Stock
More Options & Item Details
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
ID:
672935
Weight:
4.06ct
Size:
13 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
9.74
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
668248
Weight:
8.59ct (total)
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.31
Item in Stock
More Options & Item Details
ID:
688430
Weight:
1.01ct
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.42
Item in Stock
More Options & Item Details
ID:
722140
Weight:
17.76ct (total)
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
21.31
Item in Stock
More Options & Item Details
ID:
669429
Weight:
8.90ct (total)
Size:
10.5 x 10.4 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.68
Item in Stock
More Options & Item Details
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
1
2
3
4
pcs 0 in Cart
ID:
669489
Weight:
19.19ct
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
23.03
Item in Stock
More Options & Item Details
ID:
721383
Weight:
9.97ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
11.96
Item in Stock
More Options & Item Details
ID:
669892
Weight:
4.46ct
Size:
10.5 x 10.4 mm
Clarity:
Opaque
Price:
$
5.35
Item in Stock
More Options & Item Details
ID:
688033
Weight:
3.17ct (total)
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
7.61
Item in Stock
More Options & Item Details
ID:
721789
Weight:
10.14ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
12.17
Item in Stock
More Options & Item Details
ID:
721330
Weight:
4.46ct
Size:
10.5 x 10.5 mm
Clarity:
Opaque
Price:
$
5.35
Item in Stock
More Options & Item Details
ID:
672438
Weight:
4.24ct
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Price:
$
10.18
Item in Stock
More Options & Item Details
ID:
721608
Weight:
9.31ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
11.17
Item in Stock
More Options & Item Details
Select
1
2
3
pcs 0 in 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
ID:
688432
Weight:
0.85ct
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
2.04
Item in Stock
More Options & Item Details
ID:
672131
Weight:
4.56ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
10.94
Item in Stock
More Options & Item Details
Select
1
2
3
4
5
6
7
8
9
10
11
12
13
pcs 0 in 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
ID:
688344
Weight:
2.89ct (total)
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
6.94
Item in Stock
More Options & Item Details
ID:
669546
Weight:
21.26ct
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
25.51
Item in Stock
More Options & Item Details
ID:
671962
Weight:
4.85ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
11.64
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
688179
Weight:
1.98ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.75
Item in Stock
More Options & Item Details
ID:
688336
Weight:
3.07ct (total)
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
7.37
Item in Stock
More Options & Item Details
ID:
722398
Weight:
10.08ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
12.10
Item in Stock
More Options & Item Details
Select
1
2
3
4
5
pcs 0 in Cart
ID:
687946
Weight:
1.03ct
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.47
Item in Stock
More Options & Item Details
Select
1
2
3
4
pcs 0 in Cart
ID:
721787
Weight:
9.60ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
11.52
Item in Stock
More Options & Item Details
ID:
687775
Weight:
1.99ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.78
Item in Stock
More Options & Item Details
ID:
687951
Weight:
1.31ct
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Price:
$
3.14
Item in Stock
More Options & Item Details
Select
1
2
3
pcs 0 in Cart
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10
I would recommend gem select yo everyone
Fast service and no problems
Posted By Steve in March, 2025
Source: Bizrate
Overall Rating -> 10
Enjoyed shopping.
Posted By Chris in March, 2025
Source: Bizrate
Overall Rating -> 10
Always find more niche sizes/shapes as my unconventional designs require from this website. Recommending to fellow designers in the creative atmosphere on the usual, specially due to the quality and certification of gems.
Posted By Sina in April, 2025
Source: Bizrate
Overall Rating -> 10
I am filling a small treasure chest and picked a nice amethyst.
Posted By VinnyD in August, 2025
Source: Bizrate
Overall Rating -> 10
Great for buying gemstones, came with authenticity certs. Will buy again someday!
Posted By Uggadugga in May, 2025
Source: Bizrate
Overall Rating -> 9
I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.
Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate
Overall Rating -> 9
I was looking for a small gift for a friend- the process is the same as every other time and was very simple, and she even got her gift early! On the downside, there's no way to easily keep track of multiple Shipping Addresses, so if I want to send a gift to Friend A and to Friend B, I have to overwrite everything and it's a fair bit clunky in that regard.
Posted By Jezzi in June, 2025
Source: Bizrate
Overall Rating -> 10
nothing but good. always have a great selection. I am a hobbyist and only collect. Great prices. I could take all day looking at a small percent of all the gemstone, fantastic
Posted By Steve m. in February, 2025
Source: Bizrate
Overall Rating -> 10
Muy serios y muy oportunos para el envo
Posted By Veronica in September, 2024
Source: Bizrate