This mineral is usually recognized by its color, cleavage, and unusual luster. It commonly occurs in magic igneous rocks and was named from the Greek word meaning “opponent” because of its refractory nature.
Minerals
This mineral is usually recognized by its color, cleavage, and unusual luster. It commonly occurs in magic igneous rocks and was named from the Greek word meaning “opponent” because of its refractory nature.
Mineral Photos courtesy of R.Weller/Cochise College