Image: <a href="//commons.wikimedia.org/wiki/User:Archaeodontosaurus" title="User:Archaeodontosaurus">Didier Descouens</a> (CC BY-SA 4.0)
trigonalcommonCarbonates
Siderite
FeCO₃
This specimen features brownish, rhombohedral crystals of siderite, likely associated with lighter quartz and metallic chalcopyrite, characteristic of its historic locality.
Siderite Physical Properties
Mohs Hardness
3.5Crystal System
trigonalLuster
vitreousStreak Color
whiteCleavage
perfect rhombohedral {1011}Fracture
unevenSpecific Gravity
3.96Colors
brown, yellowish-brown, reddish-brown, grayTransparency
translucentType Locality
Redruth - St Day District, Cornwall, England, UKMineral Group
CarbonatesUses
iron ore, collectorAssociated Minerals
quartz, chalcopyriteRarity
commonGeological Context
Siderite typically forms in hydrothermal veins, often associated with metallic ore deposits, and can also occur in sedimentary environments as an iron-rich carbonate.
