Paragonite | |
Chemical Formula |
NaAl2[(OH)2|AlSi3O10] |
Species |
Silicates |
Crystal System |
Monoclinic |
Mohs Scale |
2 |
Specific Gravity |
2.78 |
Color |
Colorless, pale yellow, grayish, grayish white, greenish, light apple-green |
Streak |
White |
Luster |
Pearly |
Refractive Index |
n = 1.564 - 1.580 n = 1.594 - 1.609 n = 1.600 - 1.609 |
Diaphaneity |
transparent to translucent |
Cleavage |
Perfect on the |
Fracture |
Micaeous |
Crystal Habit:massive, fibrous or scaly |