Neat piece with black short prismatic Schorl crystals to 4mm in a long paralell group, possibly after a larger Schorl crystal, with pure white Albite crystals to 1cm, silvery platy Muscovite, and a couple red Spessartine Garnets to 4mm.
Schorl
Formula
NaFe2+3Al6(BO3)3Si6O18(OH)4
Crystal System
Trigonal
Crystal Habit
Acicular, Prismatic, Striated
Cleavage
Indistinct, None, None
Luster
Vitreous (Glassy)
Color
black, brownish black, greenish black, bluish black