Image: <bdi><a href="https://www.wikidata.org/wiki/Q108103612" class="extiw" title="d:Q108103612"><span title="Wikipedian and OpenStreetMap mapper from Cologne, Open Data activist">Raimond Spekking</span></a></bdi> (CC BY-SA 4.0)
monocliniccommonSorosilicates
Epidote
Ca2Al2Fe3+(SiO4)(Si2O7)O(OH)
This specimen features dark green to blackish-green, prismatic Epidote crystals, some with well-defined faces, associated with lighter-colored Albite and yellowish Titanite.
Epidote Physical Properties
Mohs Hardness
6Crystal System
monoclinicLuster
vitreousStreak Color
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 translucent to opaqueType Locality
Minas Gerais, BrazilMineral Group
SorosilicatesUses
collector's specimens, minor gemstoneAssociated Minerals
titanite, albite, quartz, feldspar, garnetRarity
commonGeological Context
Epidote commonly forms in regionally metamorphosed rocks (e.g., greenschist facies), contact metamorphic rocks, and hydrothermally altered igneous rocks. It is also found in veins and as an alteration product of plagioclase feldspar.
