Cyanotrichite | |
Chemical Formula |
Cu4Al2[(OH)12|SO4]·2H2O |
Species |
Sulfates |
Crystal System |
Orthorhombic |
Mohs Scale |
1-3 |
Specific Gravity |
2.76 |
Color |
sky-blue, azure-blue |
Streak |
light blue |
Luster |
Silky |
Refractive Index |
n = 1.588 n = 1.617 n = 1.655 |
Crystal Habit:Occurs as velvet-, wool- or cotton-like aggregates and coatings comprised of minute acicular crystals; also radial-fibrous or tufted. |