| Mineral | Tunellite |
|---|---|
| Formula | SrB6O9(OH)2 • 3H2O |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | Perfect on {100}, Distinct on {001} |
| Color | Colorless, grayish white |
| Density | 2.4 – 2.4 g/cm3 |
| Diaphaneity | Transparent |
| Hardness | 2.5 |
| Lustre | Sub-Vitreous, Pearly |
| Streak | White |
| Type Loc. | U.S. Borax Mine, Kramer Borate dep., Boron, Kern Co., CA, USA |
| Dana 8 Class | 26.6.6.2 |
| Strunz Class | 5/K.06-20 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 316 |