enstatite

 
Pronunciation: /ˈɛnstətʌɪt/

noun

[mass noun]
  • a translucent crystalline mineral that occurs in some igneous rocks and stony meteorites. It consists of magnesium silicate and is a member of the pyroxene group.

Origin:

mid 19th century: from Greek enstatēs 'adversary' (because of its refractory nature) + -ite1