General Information:
Chemical Formula:
SiO2
Composition:
(Molecular Weight = 60.08 gm)
Silicon 46.74 % Si
Oxygen 53.26 % O
Empirical Formula:
(SiO2)
IMA Status:
Approved IMA 1962
Physical Properties:
Cleavage:
None
Color:
brown, colorless, light yellow, or dark reddish brown.
Density:
2.001 - 2.052, Average = 2.02
Diaphaniety:
Transparent to Translucent
Hardness:
6.5-7 - Pyrite-Quartz
Luminescence:
Fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
More details...