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)
orthorhombicrareSulfides
Cobaltite
CoAsS
This specimen features silvery-white, pseudocubic cobaltite crystals embedded in a dark matrix, showcasing their distinct metallic luster.
Cobaltite Physical Properties
Mohs Hardness
5.5Crystal System
orthorhombicLuster
metallicStreak Color
greyish blackCleavage
good on {100}Fracture
unevenSpecific Gravity
6.33Colors
silvery white, steel grey, reddish whiteTransparency
opaqueType Locality
Espanola, Foster Township, Sudbury District, Ontario, CanadaMineral Group
SulfidesUses
ore of cobalt, collectorAssociated Minerals
pyrite, chalcopyrite, arsenopyrite, skutterudite, calcite, quartzRarity
rareGeological Context
Cobaltite typically forms in high-temperature hydrothermal veins and contact metamorphic deposits, often associated with other sulfide minerals in cobalt-rich ore bodies.
