| Mineral | Genthelvite |
|---|---|
| Formula | Zn4(Be3Si3O12)S |
| Crystal Form | Isometric/Hextetrahedral [4 3m] |
| Cleavage | None |
| Color | Colorless, white, yellow, green, pink to red. Darkens to brown and black on weathering. |
| Density | 3.6 g/cm3 |
| Diaphaneity | Transparent, Translucent |
| Fracture | Brittle - Uneven |
| Hardness | 6.0 - 6.5 |
| Lustre | Vitreous |
| Streak | White |
| Dana 8 Class | 76.2.4.3 |
| Strunz Class | 8/J.12-30 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 243 |