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| ID: | 669490 |
| Weight: | 22.42 |
| Size: | 25 x 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 22.42 |
| Item in Stock | |
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| ID: | 669290 |
| Weight: | 32.30 |
| Size: | 25.6 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 38.76 |
| Item in Stock | |
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| ID: | 721546 |
| Weight: | 8.69 |
| Size: | 10.5 x 10.4 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 10.43 |
| Item in Stock | |
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| ID: | 721600 |
| Weight: | 8.92 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 10.70 |
| Item in Stock | |
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| ID: | 669901 |
| Weight: | 4.36 |
| Size: | 10.5 x 10.4 mm |
| Clarity: | Opaque |
| Price: | $ 5.23 |
| Item in Stock | |
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| ID: | 672137 |
| Weight: | 4.70 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.28 |
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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: | 688186 |
| Weight: | 2.33 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.59 |
| Item in Stock | |
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| ID: | 722396 |
| Weight: | 4.50 |
| Size: | 10.5 x 10.4 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 5.40 |
| Item in Stock | |
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| ID: | 687951 |
| Weight: | 1.31 |
| Size: | 6.5 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 3.14 |
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| ID: | 669431 |
| Weight: | 8.64 |
| Size: | 10.5 x 10.3 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 10.37 |
| Item in Stock | |
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| ID: | 668860 |
| Weight: | 4.35 |
| Size: | 10 x 10 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 12.47 |
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| ID: | 687778 |
| Weight: | 2.11 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.06 |
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| ID: | 668905 |
| Weight: | 6.79 |
| Size: | 9.9 x 9.4 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 6.79 |
| 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: | 687548 |
| Weight: | 2.11 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.06 |
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| ID: | 721378 |
| Weight: | 9.19 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 11.03 |
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| ID: | 722139 |
| Weight: | 21.54 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 25.85 |
| Item in Stock | |
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| ID: | 669671 |
| Weight: | 8.31 |
| Size: | 10.4 x 10.4 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 9.97 |
| 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 |
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| ID: | 688182 |
| Weight: | 1.98 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 4.75 |
| Item in Stock | |
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| ID: | 687946 |
| Weight: | 1.03 |
| Size: | 6.5 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 2.47 |
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| ID: | 671956 |
| Weight: | 4.76 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.42 |
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| ID: | 669106 |
| Weight: | 6.48 |
| Size: | 9.9 x 9.4 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 7.78 |
| Item in Stock | |
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| ID: | 669496 |
| Weight: | 26.89 |
| Size: | 30.2 x 20.5 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 32.27 |
| Item in Stock | |
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| ID: | 687658 |
| Weight: | 2.36 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.66 |
| Item in Stock | |
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| ID: | 722394 |
| Weight: | 4.35 |
| Size: | 10.5 x 10.3 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 5.22 |
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| ID: | 722356 |
| Weight: | 16.58 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 19.90 |
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| ID: | 722137 |
| Weight: | 21.82 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 26.18 |
| Item in Stock | |
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| ID: | 721332 |
| Weight: | 4.46 |
| Size: | 10.5 x 10.3 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 5.35 |
| Item in Stock | |
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| ID: | 672444 |
| Weight: | 11.25 |
| Size: | 20 x 15 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 27.00 |
| Item in Stock | |
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| ID: | 673173 |
| Weight: | 8.01 |
| Size: | 13 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 19.22 |
| Item in Stock | |
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| ID: | 673179 |
| Weight: | 8.06 |
| Size: | 13 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 19.34 |
| Item in Stock | |
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| ID: | 688440 |
| Weight: | 2.05 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 4.92 |
| 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: | 672024 |
| Weight: | 19.68 |
| Size: | 25 x 18 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 47.23 |
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| ID: | 668258 |
| Weight: | 9.56 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 11.47 |
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| ID: | 668866 |
| Weight: | 3.35 |
| Size: | 9.9 x 9.3 mm |
| Clarity: | Opaque |
| Price: | $ 4.02 |
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| ID: | 686805 |
| Weight: | 2.93 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.86 |
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| ID: | 722388 |
| Weight: | 10.59 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 12.71 |
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| ID: | 672132 |
| Weight: | 4.89 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.74 |
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| ID: | 721604 |
| Weight: | 9.32 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 11.18 |
| Item in Stock | |
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| ID: | 721786 |
| Weight: | 9.91 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.89 |
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| ID: | 721380 |
| Weight: | 9.47 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.36 |
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| ID: | 722140 |
| Weight: | 17.76 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 21.31 |
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| ID: | 722135 |
| Weight: | 17.54 |
| Size: | 18 x 13 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 21.05 |
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| ID: | 672032 |
| Weight: | 19.74 |
| Size: | 25 x 18 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 47.38 |
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| ID: | 672139 |
| Weight: | 4.66 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.18 |
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| ID: | 687498 |
| Weight: | 1.58 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 3.79 |
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| ID: | 671960 |
| Weight: | 4.70 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.28 |
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| 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: | 669894 |
| Weight: | 4.22 |
| Size: | 10 x 10 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 5.06 |
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| ID: | 688177 |
| Weight: | 2.20 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.28 |
| Item in Stock | |
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| ID: | 671957 |
| Weight: | 4.88 |
| Size: | 11 x 11 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 11.71 |
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| ID: | 669434 |
| Weight: | 8.49 |
| Size: | 10.5 x 10.3 mm |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 10.19 |
| Item in Stock | |
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| ID: | 669892 |
| Weight: | 4.46 |
| Size: | 10.5 x 10.4 mm |
| Clarity: | Opaque |
| Price: | $ 5.35 |
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| ID: | 687944 |
| Weight: | 1.12 |
| Size: | 6.5 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 2.69 |
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| ID: | 687495 |
| Weight: | 1.23 |
| Size: | 7 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 2.95 |
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| ID: | 687549 |
| Weight: | 2.24 |
| Size: | 5.5 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 5.38 |
| Item in Stock | |
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| ID: | 687941 |
| Weight: | 1.43 |
| Size: | 6.5 mm (calibrated) |
| Clarity: | Opaque |
| Price: | $ 3.43 |
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Why Buy Black Onyx from GemSelect?
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- Supplying natural gemstones to jewelers and collectors in 120+ countries
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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 
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 
I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.
Posted By Meyeusername in March, 2026
Source: Bizrate
Overall Rating -> 10
I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?
Posted By Lynn in September, 2025
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 -> 9 
Will know more once order received
Posted By Jim in September, 2025
Source: Bizrate
Overall Rating -> 10
Good. I ts very user friendly.
Posted By Shalini in June, 2025
Source: Bizrate
