General Information:
Chemical Formula:
(Zn,Al)3(Si,Al)2O5(OH)4
Environment:
Alteration product of smithsonite.
Locality:
Vielle-Montagne, Balgium.
Physical Properties:
Cleavage:
[???] Perfect
Color:
bluish, yellowish white, or light green.
Density:
3.54
Diaphaniety:
Subtransparent to opaque
Habits:
Fibrous - Crystals made up of fibers., Encrustations - Forms crust-like aggregates on matrix.,
Hardness:
2.5 - Finger Nail
Luster:
Silky
Streak:
white
More details...