| Name | Yooperlite |
| Class | Silicates |
| Category | Syenite with fluorescent sodalite |
| Crystal system | Cubic (for the sodalite contained in the rock) |
| Chemical composition | Igneous rock mainly composed of feldspars, containing fluorescent sodalite (Na₈(Al₆Si₆O₂₄)Cl₂) |
| Hardness (Mohs scale) | 5.5 to 6 |
| Transparency | Opaque |
| Geographical origin | Shorelines of Lake Superior (Michigan, USA, and Ontario, Canada) |






















































































































































































































