| Name | Obsidian Eye of Heaven |
| Class | Semi-precious |
| Category | Volcanic rock |
| Crystal system | Amorphous |
| Chemical composition | Silicon dioxide (SiO₂) with mineral inclusions causing concentric iridescence |
| Hardness (Mohs scale) | 5 to 5.5 |
| Transparency | Opaque |
| Geographical origin | Mexico (mainly), United States, Peru |















