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 (Phyllosilicates)
Chlorite
(Mg,Fe,Al)6(Si,Al)4O10(OH)8
This specimen features dark green, platy crystals of chlorite, often appearing as coatings or inclusions within other minerals. The chlorite is prominently associated with clear quartz crystals.
Chlorite Physical Properties
Mohs Hardness
2.5Crystal System
monoclinicLuster
pearlyStreak Color
white to pale greenCleavage
perfect basal (one direction)Fracture
unevenSpecific Gravity
2.8Colors
green, dark green, yellowish-green, brownish-greenTransparency
translucent to opaqueType Locality
Hot Springs, Garland County, ArkansasMineral Group
Silicates (Phyllosilicates)Uses
industrial (filler, insulation), collectorAssociated Minerals
quartzRarity
commonGeological Context
Chlorite is a common mineral formed during low-grade regional metamorphism of mafic igneous rocks and shales. It also frequently occurs as a hydrothermal alteration product in various igneous and metamorphic rocks.
