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)
monocliniccommonSilicates
Chlorite
(Mg,Fe,Al)6(Si,Al)4O10(OH)8
This specimen features dark green to blackish chlorite crystals or aggregates coating and intergrown with clear to milky quartz crystals, creating a visually interesting mineral cluster.
Chlorite Physical Properties
Mohs Hardness
2.5Crystal System
monoclinicLuster
vitreousStreak Color
white to greenish whiteCleavage
perfect basal on {001}Fracture
unevenSpecific Gravity
2.9Colors
green, dark green, yellowish-green, brown, blackTransparency
translucent to opaqueType Locality
Grieswies-Mähder, Grieswies, Grieswies - Krumlkeeskopf Mt. area, Hüttwinkl valley, Rauris valley, Hohe Tauern Mts, Salzburg, AustriaMineral Group
SilicatesUses
collector, minor industrialAssociated Minerals
quartz, epidote, actinolite, garnet, magnetiteRarity
commonGeological Context
Chlorite is a common phyllosilicate mineral formed during low to medium-grade metamorphism of mafic rocks and sediments, often as an alteration product of other iron-magnesium silicates. It also occurs in hydrothermal veins.
