General Information:
Chemical Formula:
(Mg,Fe)2SiO4
Composition:
(Molecular Weight = 153.31 gm)
Magnesium 25.37 % Mg
Iron 14.57 % Fe
Silicon 18.32 % Si
Oxygen 41.74 % O
Empirical Formula:
Mg1.6Fe2+0.4(SiO4)
Environment:
Basic and ultra basic igneous rocks.
IMA Status:
Not IMA Approved
Locality:
Common world wide occurrence.
Name Origin:
Named after the green color.
Physical Properties:
Cleavage:
[001] Good, [010] Distinct
Color:
yellowish green, olive green, greenish black, or reddish brown.
Density:
3.27 - 3.37, Average = 3.32
Diaphaniety:
Transparent to translucent
Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., ,
Hardness:
6.5-7 - Pyrite-Quartz
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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