Buy Black Onyx Gems
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| ID: | 721377 |
| Weight: | 8.25 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 9.90 |
| Item in Stock | |
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pcs
| ID: | 721328 |
| Weight: | 4.40 |
| Size: | 10.5 x 10.4 mm |
| Clarity: | Opaque |
| Price: | $ 5.28 |
| Item in Stock | |
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pcs
| ID: | 722391 |
| Weight: | 13.39 |
| Size: | 18.3 x 14.1 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 16.07 |
| Item in Stock | |
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| ID: | 687496 |
| Weight: | 1.61 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 3.86 |
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pcs
| ID: | 669125 |
| Weight: | 3.16 |
| Size: | 9.8 x 9.3 mm |
| Clarity: | Opaque |
| Price: | $ 3.79 |
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pcs
| ID: | 721330 |
| Weight: | 4.46 |
| Size: | 10.5 x 10.5 mm |
| Clarity: | Opaque |
| Price: | $ 5.35 |
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pcs
| ID: | 687946 |
| Weight: | 1.03 |
| Size: | 6.5 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 2.47 |
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pcs
| ID: | 673177 |
| Weight: | 8.18 |
| Size: | 13 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 19.63 |
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| ID: | 721792 |
| Weight: | 8.11 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 9.73 |
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| ID: | 722393 |
| Weight: | 4.35 |
| Size: | 10.5 x 10.4 mm |
| Clarity: | Opaque |
| Price: | $ 5.22 |
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pcs
| ID: | 672028 |
| Weight: | 19.29 |
| Size: | 25 x 18 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 46.30 |
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pcs
| ID: | 672137 |
| Weight: | 4.70 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.28 |
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pcs
| ID: | 669296 |
| Weight: | 24.74 |
| Size: | 25.7 x 19.6 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 29.69 |
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| ID: | 687772 |
| Weight: | 2.19 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.26 |
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| ID: | 721610 |
| Weight: | 10.30 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 12.36 |
| Item in Stock | |
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| ID: | 668911 |
| Weight: | 6.69 |
| Size: | 9.9 x 9.4 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 8.03 |
| Item in Stock | |
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| ID: | 722386 |
| Weight: | 12.67 |
| Size: | 18.5 x 13.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 15.20 |
| Item in Stock | |
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| ID: | 669489 |
| Weight: | 19.19 |
| Size: | 25 x 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 23.03 |
| Item in Stock | |
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| ID: | 671955 |
| Weight: | 4.74 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.38 |
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pcs
| ID: | 672136 |
| Weight: | 4.54 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 10.90 |
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pcs
| ID: | 688343 |
| Weight: | 2.90 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 6.96 |
| Item in Stock | |
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| ID: | 686808 |
| Weight: | 3.10 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 7.44 |
| Item in Stock | |
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| ID: | 687500 |
| Weight: | 1.63 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 3.91 |
| Item in Stock | |
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| ID: | 722387 |
| Weight: | 5.80 |
| Size: | 16 x 12 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 5.80 |
| Item in Stock | |
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Why Buy Black Onyx from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
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
GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'
Posted By CJ in March, 2026
Source: Bizrate
Overall Rating -> 10
Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.
Posted By RenoRose in January, 2026
Source: Bizrate
Overall Rating -> 10
All good
Posted By DouscheGift in August, 2025
Source: Bizrate
Overall Rating -> 10
The stones are very nice.
Posted By Mvk in August, 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
