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It is important group of rock forming minerals.
They are commonly occur in dark colours, igneous and metamorphic rocks They are rich in calcium, magnesium, iron, silicates
It show single chain structure of silicate
It is classified into orthopyroxene and clinopyroxene. It is based on internal atomic structure
ORTHOPYROX ENE: Enstatite
Augite [(Ca, Na) (Mg, Fe, Al) (Al,
Si)2O6] Diopside [CaMgSi2O6]
CRYSTAL SYSTEM: Monoclinic
CLEAVAGE: Good ( primastic cleavage)
COLOUR: shades of greyish green and black
SPECIFIC GRAVITY: medium
OCCURRENCE: ferro magnesium mineral of igneous rock (dolerite)
USES: rock forming mineral
COMPOSITON: [(Ca, Na) (Mg, Fe, Al) (Al, Si)2O6]
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