Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
monoclinicuncommonsilicates
Epidote
Ca₂Al₂Fe³⁺(SiO₄)(Si₂O₇)O(OH)
This specimen features a cluster of dark green epidote crystals, some bundled, with the largest crystal displaying a prominent, broad, equant termination.
Epidote Physical Properties
Mohs Hardness
6Crystal System
monoclinicLuster
vitreousStreak Color
white to grayish whiteCleavage
perfect on {001}, good on {100}Fracture
uneven to conchoidalSpecific Gravity
3.35Colors
dark green, pistachio green, yellowish green, brownish green, blackish greenTransparency
transparent to translucentType Locality
Murrieta, Riverside County, CaliforniaMineral Group
silicatesUses
collector, indicator mineral, minor gemstoneAssociated Minerals
quartz, feldspar, garnet, amphiboles, chloriteRarity
uncommonGeological Context
Epidote is a common metamorphic mineral, typically forming in regionally metamorphosed rocks (e.g., greenschist facies), contact metamorphic aureoles, and hydrothermally altered igneous rocks.
