General Information:
Chemical Formula:
Fe++2SiO4
Composition:
(Molecular Weight = 203.78 gm)
Iron 54.81 % Fe
Silicon 13.78 % Si
Oxygen 31.41 % O
Empirical Formula:
Fe2+2(SiO4)
Environment:
Ultra mafic silica-poor igneous rocks.
Locality:
Lipari Islands, Sicily.
Physical Properties:
Cleavage:
[010] Indistinct
Color:
brown, black, or black.
Density:
4.39
Diaphaniety:
Transparent to Translucent
Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., Granular - Generally occurs as anhedral to subhedral crystals in matrix.,
Hardness:
6.5 - Pyrite
Luminescence:
None.
Luster:
Vitreous (Glassy)
Streak:
white
More details...