Pollucite
Chemical Formula	Cs(Si2Al)O6.nH2O
Species	Silicates
Crystal System	Isometric
Mohs Scale	6
Specific Gravity	2.7-3.0
Color	Usually colorless, also white, grey, pink, blue or Purple
Streak	White
Luster	Vitreous, Sub-Vitreous, Resinous, Waxy, Greasy
Refractive Index	1.508-1.528
Diaphaneity	Transparent, Translucent
Cleavage	None Observed
Fracture	Sub-Conchoidal
Crystal Habit：Usually massive, rare crystals are normally trapezohedral or cubic