Magnesite
Physical Properties
| Color | white |
| Form/Habit | granular |
| Lusture | earthy |
| Streak | white |
| Hardness | 3.5-5 |
| Cleavage | perfect 3 sets rhombohedral |
| Fracture | conchoidal |
| Specific Gravity | 3.0 (moderate) |
| Chemical Composition | MgCO3 |
| Crystal System | hexagonal (rhombohedral) |
| Diagnostic Properties | granular texture, rhombohedral form, perfect 3 sets rhombohedral cleavage, conchoidal fractures |