Mineral | Bertrandite |
---|---|
Formula | Be4(Si2O7)(OH)2 |
Crystal Form | Orthorhombic/Pyramidal [mm2] |
Cleavage | Perfect on {001}; Distinct on {100},{010},{110} |
Color | Colorless, pale yellow |
Density | 2.6 – 2.6 g/cm3 |
Diaphaneity | Transparent, Translucent |
Fracture | Brittle |
Hardness | 6.0 - 7.0 |
Lustre | Vitreous |
Streak | White |
Type Loc. | Petit-Port, Nantes, Loire-Atlantique, Pays de Loire, France |
Dana 8 Class | 56.1.1.1 |
Strunz Class | 8/C.07-10 |
Mindat | mindat.org |
WebMineral | WebMineral |
ID | 262 |