| Mineral | Brewsterite-(Sr) |
|---|---|
| Formula | (Sr,Ba,Ca)[Al2Si6O16] • 5(H2O) |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | [010] Perfect |
| Color | White, Yellowish white, Gray |
| Density | 2.5 g/cm3 |
| Diaphaneity | Transparent to Translucent |
| Hardness | 5.0 |
| Lustre | Vitreous |
| Streak | White |
| Type Loc. | Strontian, NW Highlands, Scotland, UK |
| Dana 8 Class | 77.1.7.1 |
| Strunz Class | VIII/J.23-80 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 117 |