| Mineral | Perhamite |
|---|---|
| Formula | Ca3Al7.7Si3P4O23.5(OH)14.1 • 8H2O |
| Crystal Form | Trigonal/Hexagonal Scalenohedral [3 2/m] |
| Cleavage | Imperfect on {0001} |
| Color | Colorless, White, Light brown, Orange |
| Density | 2.5 – 2.6 g/cm3 |
| Diaphaneity | Transparent, Translucent |
| Fracture | Very brittle |
| Hardness | 5.0 |
| Lustre | Vitreous, Sub-vitreous, Pearly |
| Streak | White |
| Type Loc. | Bell pit, Newry, Oxford Co., ME, USA |
| Dana 8 Class | 43.5.10.1 |
| Strunz Class | 8/J.20-10 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 349 |