| Mineral | Willemite |
|---|---|
| Formula | Zn2SiO4 |
| Crystal Form | Trigonal/Rhombohedral [3] |
| Cleavage | [0001] Poor, [1120] Poor |
| Color | White, Yellow, Green, Reddish brown, Black |
| Density | 3.9 – 4.2 g/cm3 |
| Diaphaneity | Transparent to Translucent to Op |
| Fracture | Uneven |
| Hardness | 5.5 |
| Lustre | Vitreous - Resinous |
| Streak | White |
| Dana 8 Class | 51.1.1.2 |
| Strunz Class | VIII/A.01-20 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 140 |