Hedenbergite
Image: Robert M. Lavinsky (CC BY-SA 3.0)
Mineral NameHedenbergite
Chemical FormulaCaFeSi2O6
Mohs Hardness5.5
Crystal Systemmonoclinic
Lustervitreous
Streak Colorgreenish-gray
Cleavagegood on {110}
Fractureuneven
Specific Gravity3.5
Colorsdark green, black, brownish-green
Transparencytranslucent
Type LocalityMega Horio, Serifos Island, Cyclade Islands, Kykládes Prefecture, Aegean Islands Department, Greece
Mineral Groupsilicates
Usescollector
Associated Mineralsquartz
Rarityuncommon
Description
This specimen features dark green to black, prismatic Hedenbergite crystals intergrown with clear to milky white Quartz crystals, forming an aesthetic mineral cluster.
Geological Context
Hedenbergite is a member of the pyroxene group, commonly found in skarns, contact metamorphic rocks, and some iron-rich igneous rocks, often associated with other calc-silicate minerals.
