pyroxene

dark-green to black glassy mineral of the pyroxene group containing large amounts of aluminum and iron and magnesium

A mineral occurring in triclinic crystals approaching pyroxene in angle, and of a greenish black color

a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene

A variety of enstatite, often having a bronzelike luster. It is a silicate of magnesia and iron, of the pyroxene family.

plural of clinopyroxene