| Total qty | Discount | Per unit | You save |
|---|---|---|---|
| 1 – 2 | — | — | |
| 3 – 4 | 5% off | ||
| 5 – 9 | 10% off | ||
| 10 + | 12% off |
Black Onyx — also known as black agate — is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye. Natural black chalcedony is exceptionally rare; virtually all black chalcedony on the market is grey chalcedony that has been chemically treated to achieve its deep, uniform black color. Black Onyx is the top-selling chalcedony in the gemstone market and has a rich history as a staple of Art Deco jewelry design.
These cushion flat top single bevel cabochons offer a classic shape well-suited for rings, pendants, brooches, and other settings requiring a polished, opaque stone with clean lines. Each stone presents a uniform opaque black appearance ideal for both contemporary and vintage-inspired metalwork.
Clean with warm, soapy water. Use of an ultrasonic or steam cleaner is generally considered safe for these stones.
| Stone Type | Genuine Black Onyx (Dyed Black Chalcedony) |
|---|---|
| Cut | Cushion Flat Top, Single Bevel |
| Color | Uniform Opaque Black |
| Treatment | Dyed |
| Transparency | Opaque |
| Part # | Stone Size |
|---|---|
| 947-402 | 12 mm x 10 mm |
| 947-403 | 14 mm x 12 mm |
| 947-404 | 16 mm x 12 mm |
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