Raspite

General Information:
 Chemical Formula:
PbWO4
 Composition:
(Molecular Weight = 455.05 gm)
Lead 45.53 % Pb
Tungsten 40.40 % W 
Oxygen 14.06 % O 
 Empirical Formula:
Pb(WO4)
Physical Properties:
 Cleavage:
[100] Perfect
 Color:
yellow brown, yellow gray, or light yellow.
 Density:
8.465
 Hardness:
2.5-3 - Finger Nail-Calcite
 Luster:
Adamantine
 Streak:
yellow white
More details...