Buy Black Onyx Gems
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| ID: | 688033 |
| Weight: | 3.17 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 7.61 |
| Item in Stock | |
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| ID: | 721541 |
| Weight: | 8.67 |
| Size: | 10.5 x 10.3 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 8.67 |
| Item in Stock | |
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| ID: | 688459 |
| Weight: | 2.32 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.57 |
| Item in Stock | |
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| ID: | 673305 |
| Weight: | 21.84 |
| Size: | 22 x 15.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 117.94 |
| Item in Stock | |
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| ID: | 669678 |
| Weight: | 8.38 |
| Size: | 10.5 x 10.4 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 10.06 |
| Item in Stock | |
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| ID: | 721381 |
| Weight: | 10.69 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 12.83 |
| Item in Stock | |
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pcs
| ID: | 722404 |
| Weight: | 11.28 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 13.54 |
| Item in Stock | |
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| ID: | 669544 |
| Weight: | 19.71 |
| Size: | 25 x 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 23.65 |
| Item in Stock | |
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| ID: | 721549 |
| Weight: | 8.54 |
| Size: | 10.5 x 10.4 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 10.25 |
| Item in Stock | |
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| ID: | 721601 |
| Weight: | 10.40 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 12.48 |
| Item in Stock | |
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| ID: | 669102 |
| Weight: | 8.64 |
| Size: | 10 x 10 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 10.37 |
| Item in Stock | |
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| ID: | 722388 |
| Weight: | 10.59 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 12.71 |
| Item in Stock | |
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pcs
| ID: | 687654 |
| Weight: | 1.98 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 4.75 |
| Item in Stock | |
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| ID: | 687949 |
| Weight: | 1.08 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 2.59 |
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pcs
| ID: | 669221 |
| Weight: | 4.19 |
| Size: | 10.5 x 10.3 mm |
| Clarity: | Opaque |
| Price: | $ 5.03 |
| Item in Stock | |
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pcs
| ID: | 721608 |
| Weight: | 9.31 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.17 |
| Item in Stock | |
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pcs
| ID: | 668248 |
| Weight: | 8.59 |
| Size: | 10 x 10 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 10.31 |
| Item in Stock | |
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| ID: | 687775 |
| Weight: | 1.99 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 4.78 |
| Item in Stock | |
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| ID: | 722138 |
| Weight: | 20.42 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 24.50 |
| Item in Stock | |
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| ID: | 668904 |
| Weight: | 8.67 |
| Size: | 10 x 10 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 10.40 |
| Item in Stock | |
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| ID: | 687833 |
| Weight: | 2.93 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 7.03 |
| Item in Stock | |
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| ID: | 688345 |
| Weight: | 2.78 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 6.94 |
| Item in Stock | |
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| ID: | 721380 |
| Weight: | 9.47 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.36 |
| Item in Stock | |
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pcs
| ID: | 673179 |
| Weight: | 8.06 |
| Size: | 13 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 19.34 |
| Item in Stock | |
| More Options & Item Details | |
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
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GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
Easy and functional
Posted By Dessa in March, 2026
Source: Bizrate
Overall Rating -> 10
Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!
Posted By SallyO in February, 2026
Source: Bizrate
Overall Rating -> 10
Great prices!!! High quality gemstones.
Posted By Ricky in October, 2025
Source: Bizrate
Overall Rating -> 9 
Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly
Posted By Ron T in November, 2025
Source: Bizrate
Overall Rating -> 10
this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.
Posted By Tommyp in November, 2025
Source: Bizrate
Overall Rating -> 8 
First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.
Posted By Salvo in July, 2025
Source: Bizrate
