Deep to bright green prismatic crystals with rectangular outline to 5mm. McConlogue acquired this specimen from John Betts, who acquired it from the Peter B. Nalle (1923-2010) collection.
Hedenbergite
Formula
CaFe2+Si2O6
Crystal System
Monoclinic
Crystal Habit
Granular, Crystalline - Fine, Lamellar
Cleavage
Perfect, Indistinct, None
Luster
Vitreous - Pearly
Color
brownish green, gray green, grayish black, dark green, black