Image: <a rel="nofollow" class="external text" href="https://www.flickr.com/people/47445767@N05">James St. John</a> (CC BY 2.0)
monocliniccommonsulfides
Arsenopyrite
FeAsS
The image displays a metallic, silvery-white to steel-gray mass of arsenopyrite, exhibiting some crystalline faces and a characteristic luster.
Arsenopyrite Physical Properties
Mohs Hardness
5.5Crystal System
monoclinicLuster
metallicStreak Color
dark grayish-blackCleavage
distinct on {101}Fracture
uneven to conchoidalSpecific Gravity
6Colors
silvery white, steel gray, tin whiteTransparency
opaqueType Locality
Panasqueira, PortugalMineral Group
sulfidesUses
ore of arsenic, minor ore of goldAssociated Minerals
quartz, pyrite, chalcopyrite, sphalerite, galena, goldRarity
commonGeological Context
Arsenopyrite commonly forms in high-temperature hydrothermal veins, contact metamorphic deposits, and pegmatites, often associated with other sulfide minerals and gold.
