Black Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny 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 characteristic shiny black appearance. Black Onyx remains the top-selling chalcedony in the jewelry market and was widely featured in Art Deco jewelry design. This genuine black onyx cabochon features a flat top with a double bevel profile and includes a hole, making it suitable for a variety of jewelry and metalsmithing applications.
Features
- Genuine black onyx (dyed black chalcedony)
- Flat top with double bevel profile
- Includes hole
- Uniform opaque black color
- Treatment: Dyed
- Clean with warm, soapy water; ultrasonic and steam cleaning are generally safe
Specifications
| Stone Type |
Genuine Black Onyx (Dyed Black Chalcedony) |
| Profile |
Antique Flat Top, Double Bevel |
| Feature |
With Hole |
| Color |
Uniform Opaque Black |
| Treatment |
Dyed |
| Care |
Warm soapy water; ultrasonic and steam cleaning are generally safe |
Available Options
| Part # |
Size |
| 947-143 |
14x12mm |
California Prop 65 Warning: