| Name | Bull's Eye |
| Class | Semi-precious |
| Category | Microcrystalline quartz (fibrous quartz variety) |
| Crystal system | Trigonal |
| Chemical composition | Silicon dioxide (SiO₂) with oxidized crocidolite fibers |
| Hardness (Mohs scale) | 6.5 to 7 |
| Transparency | Opaque |
| Geographical origin | South Africa, Australia, India, Burma |















