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 staple material in Art Deco jewelry design. These cushion flat top single bevel stones feature a drilled hole and are offered in calibrated sizes, making them ideal for settings requiring consistent dimensions.
Features
- Genuine black onyx (dyed black chalcedony)
- Cushion flat top with single bevel profile
- Pre-drilled hole for design versatility
- Uniform opaque black color throughout
- Calibrated sizes for consistent fit in standard settings
- Treatment: Dyed
Specifications
| Material |
Genuine black onyx (dyed black chalcedony) |
| Color |
Uniform opaque black |
| Treatment |
Dyed |
| Shape |
Cushion flat top, single bevel |
| Feature |
Pre-drilled hole |
| Sizing Type |
Calibrated |
| Care |
Clean with warm, soapy water; ultrasonic and steam cleaning generally safe |
Available Options
| Part # |
Size |
Thickness |
| 947-432 |
12x10mm |
2.3mm |
| 947-433 |
14x12mm |
2.55mm |
| 947-434 |
16x12mm |
2.35mm |
California Prop 65 Warning: