Epidote
ID: 116
Epidote
Chemical Formula
Ca2(Al,Fe3+)3(SiO4)3(OH)
Hardness (Mohs)
6-7
Crystal System
Monoclinic
Streak
White
Luster
Vitreous
Diaphaneity
Transparent to opaque
Color
Pistachio-green, yellowish-green, brownish-green, blackish-green, rarely red or colorless
Crystal Habit / Mode of Occurrence
Prismatic, often striated crystals; massive, granular, fibrous
Fun Facts
Epidote is commonly found in metamorphosed igneous and sedimentary rocks.