noun
enstatite
A mineral name; used in geology and mineralogy. Enstatite is a magnesium silicate mineral of the pyroxene group.
頑火輝石はマグネシウムに富む輝石の一種です。
Enstatite is a type of pyroxene rich in magnesium.
The kanji 頑火輝石 are used phonetically and semantically to represent the mineral enstatite. The exact derivation is uncertain; the spelling is conventionally associated with this mineral.