Black Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny crystals of quartz that are not visible to the naked eye. Natural black chalcedony is so rare that virtually all black chalcedony on the market is grey chalcedony that has been chemically treated to achieve its signature shiny black color. Black Onyx is the top-selling chalcedony in the jewelry market and was a hallmark stone of Art Deco design. These genuine octagon flat top single bevel cabochons deliver a uniform, opaque black ideal for rings, pendants, and statement pieces.
Features
- Genuine black onyx (dyed black chalcedony)
- Octagon flat top with single bevel profile
- Uniform opaque black color throughout
- Classic cut suited for Art Deco and contemporary designs
- Safe to clean with warm, soapy water
- Generally safe for use with ultrasonic and steam cleaners
Specifications
| Stone Type |
Genuine Black Onyx |
| Material |
Dyed black chalcedony |
| Treatment |
Dyed |
| Color |
Uniform opaque black |
| Shape |
Octagon flat top, single bevel |
| Care |
Warm soapy water; ultrasonic and steam cleaners generally safe |
Available Options
| Part # |
Size |
| 947-F32 |
12x10mm |
| 947-F33 |
14x12mm |
| 947-F34 |
16x12mm |
California Prop 65 Warning: