Clades:
Pyroxenes; Inosilicate.
Chemical: MgSiO3.
Habitat: in igneous and metamorphic rocks.
Crystal system: Orthorhombic.
MineralogyEnstatite is a mineral, pyroxene, from the series enstatite (MgSiO3) to ferrosilite (FeSiO3).
Hypersthene is the intermediate composition, (Mg,Fe)SiO3, nnow named Orthopyroxene.