General Information:
Chemical Formula:
SiO2
Composition:
(Molecular Weight = 60.08 gm)
Silicon 46.74 % Si
Oxygen 53.26 % O
Empirical Formula:
(SiO2)
Environment:
Post-volcanic, magmatic, and secondary.
Locality:
Cerro San Cristobal, Mexico.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
None
Color:
blue gray, brown, gray, yellow, or white.
Density:
2.27
Diaphaniety:
Translucent to transparent
Habits:
Spherical - Spherical, rounded aggregates., Crystalline - Fine - Occurs as well-formed fine sized crystals.,
Hardness:
6.5 - Pyrite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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