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Gemtypes in Category:
Onyx (302)
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ID:
669490
Weight:
22.42ct
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
22.42
Item in Stock
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ID:
669290
Weight:
32.30ct
Size:
25.6 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
38.76
Item in Stock
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ID:
722400
Weight:
10.14ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
12.17
Item in Stock
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ID:
687489
Weight:
1.37ct
Size:
7 mm (calibrated)
Clarity:
Opaque
Price:
$
3.29
Item in Stock
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1
2
3
pcs 0 in Cart
ID:
687656
Weight:
1.96ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.70
Item in Stock
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ID:
673183
Weight:
8.25ct (total)
Size:
13 x 11 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
19.80
Item in Stock
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ID:
687772
Weight:
2.19ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.26
Item in Stock
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ID:
688437
Weight:
1.23ct
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.95
Item in Stock
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ID:
669496
Weight:
26.89ct
Size:
30.2 x 20.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
32.27
Item in Stock
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ID:
688345
Weight:
2.78ct (total)
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
6.94
Item in Stock
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ID:
721331
Weight:
4.31ct
Size:
10.5 x 10.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
5.17
Item in Stock
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ID:
669221
Weight:
4.19ct
Size:
10.5 x 10.3 mm
Clarity:
Opaque
Price:
$
5.03
Item in Stock
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1
2
3
4
5
6
7
pcs 0 in Cart
ID:
687783
Weight:
2.31ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.54
Item in Stock
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ID:
668251
Weight:
8.67ct (total)
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.40
Item in Stock
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ID:
671953
Weight:
4.85ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
11.64
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
672936
Weight:
4.20ct
Size:
13 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
10.08
Item in Stock
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ID:
688182
Weight:
1.98ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.75
Item in Stock
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ID:
672034
Weight:
19.53ct
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
46.87
Item in Stock
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1
2
3
4
5
pcs 0 in Cart
ID:
671962
Weight:
4.85ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
11.64
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
687557
Weight:
2.31ct (total)
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.54
Item in Stock
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ID:
669133
Weight:
3.35ct
Size:
9.9 x 9.3 mm
Clarity:
Opaque
Price:
$
4.02
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
722397
Weight:
10.51ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
12.61
Item in Stock
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ID:
721788
Weight:
8.70ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
10.44
Item in Stock
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ID:
722134
Weight:
20.57ct (total)
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
24.68
Item in Stock
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ID:
669676
Weight:
8.51ct (total)
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
8.51
Item in Stock
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ID:
722394
Weight:
4.35ct
Size:
10.5 x 10.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
5.22
Item in Stock
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ID:
669434
Weight:
8.49ct (total)
Size:
10.5 x 10.3 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.19
Item in Stock
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ID:
721603
Weight:
9.16ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
10.99
Item in Stock
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ID:
687652
Weight:
2.05ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.92
Item in Stock
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ID:
721381
Weight:
10.69ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
12.83
Item in Stock
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ID:
668258
Weight:
9.56ct (total)
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
11.47
Item in Stock
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ID:
672130
Weight:
4.83ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
11.59
Item in Stock
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1
2
3
4
5
pcs 0 in Cart
ID:
687944
Weight:
1.12ct
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.69
Item in Stock
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1
2
3
4
5
pcs 0 in Cart
ID:
688185
Weight:
1.96ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
4.70
Item in Stock
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ID:
721550
Weight:
8.43ct (total)
Size:
10.4 x 10.4 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.12
Item in Stock
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ID:
672028
Weight:
19.29ct
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
46.30
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
672139
Weight:
4.66ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
11.18
Item in Stock
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1
2
3
4
5
6
7
pcs 0 in 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
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ID:
687659
Weight:
2.24ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.38
Item in Stock
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ID:
669125
Weight:
3.16ct
Size:
9.8 x 9.3 mm
Clarity:
Opaque
Price:
$
3.79
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
721332
Weight:
4.46ct
Size:
10.5 x 10.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
5.35
Item in Stock
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ID:
669216
Weight:
4.38ct
Size:
10.4 x 10.4 mm
Clarity:
Opaque
Price:
$
5.26
Item in Stock
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1
2
3
4
5
pcs 0 in Cart
ID:
668249
Weight:
8.54ct (total)
Size:
10 x 10 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
10.25
Item in Stock
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ID:
722390
Weight:
9.35ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
11.22
Item in Stock
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ID:
722393
Weight:
4.35ct
Size:
10.5 x 10.4 mm
Clarity:
Opaque
Price:
$
5.22
Item in Stock
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1
2
3
pcs 0 in Cart
ID:
672229
Weight:
4.70ct
Size:
11 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
11.28
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
687945
Weight:
1.24ct
Size:
6.5 mm (calibrated)
Clarity:
Opaque
Price:
$
2.98
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
672932
Weight:
3.97ct
Size:
13 x 11 mm (calibrated)
Clarity:
Opaque
Price:
$
9.53
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
668866
Weight:
3.35ct
Size:
9.9 x 9.3 mm
Clarity:
Opaque
Price:
$
4.02
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
722388
Weight:
10.59ct
Size:
18 x 13 mm (calibrated)
Clarity:
Opaque
Price:
$
12.71
Item in Stock
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ID:
672023
Weight:
19.31ct
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
46.34
Item in Stock
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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
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ID:
672896
Weight:
20.88ct
Size:
22.1 x 15.8 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
112.75
Item in Stock
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ID:
688034
Weight:
2.61ct (total)
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
6.26
Item in Stock
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ID:
672033
Weight:
19.82ct
Size:
25 x 18 mm (calibrated)
Clarity:
Opaque
Price:
$
47.57
Item in Stock
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1
2
3
4
pcs 0 in Cart
ID:
687498
Weight:
1.58ct
Size:
7 mm (calibrated)
Clarity:
Opaque
Price:
$
3.79
Item in Stock
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ID:
687833
Weight:
2.93ct (total)
Size:
7 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
7.03
Item in Stock
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ID:
688180
Weight:
2.10ct (total)
Size:
5.5 mm (calibrated)
Clarity:
Opaque
Content:
2 pcs
Price:
$
5.04
Item in Stock
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ID:
669542
Weight:
28.87ct
Size:
27 x 20 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
34.64
Item in Stock
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ID:
669106
Weight:
6.48ct (total)
Size:
9.9 x 9.4 mm
Clarity:
Opaque
Content:
2 pcs
Price:
$
7.78
Item in Stock
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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
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
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
So far So good
Posted By VH-1 in July, 2025
Source: Bizrate
Overall Rating -> 10
I was able to find what I wanted very easily!
Posted By Lenny in January, 2026
Source: Bizrate
Overall Rating -> 10
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
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