Augite var. Fassaite
John Betts - Fine Minerals
Sharp black Augite var. Fassaite crystals in stacked cluster of parallel crystals. The Fassaite crystals have lustrous surfaces and light-colored streaks that are the result of sub-surface inclusions. Ex. Dr. E. Sensel collection #M704, originally acquired in 1991 from Mtn. Min.
Arondo, Northern Areas, Pakistan