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 Group)
Chamosite
(Fe,Mg)5Al(Si3Al)O10(OH)8
The image displays a dark, massive to earthy-looking mineral, likely chamosite, serving as a dull, opaque matrix for lighter green emerald crystals. Its color appears to be a very dark green or blackish-green.
Chamosite Physical Properties
Mohs Hardness
2Crystal System
monoclinicLuster
vitreousStreak Color
greenish whiteCleavage
perfect on {001}Fracture
unevenSpecific Gravity
3.2Colors
dark green, blackish green, black, grayTransparency
opaqueType Locality
Hupei Mine (Qinjiafang Mine), Pingjiang Co., Yueyang Prefecture, Hunan Province, ChinaMineral Group
Silicates (Chlorite Group)Uses
collector, geological indicatorAssociated Minerals
beryl, emeraldRarity
commonGeological Context
Chamosite is an iron-rich chlorite typically found in low-grade metamorphic rocks, hydrothermal alteration zones, and sedimentary iron formations. It forms under reducing conditions and is a common rock-forming mineral.
