Magnetoplumbite

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Sparkling dark grains of magnetoplumbite throughout matrix. Good rich example for the species for this classic locality. Situated in Filipstad, Varmland, Sweden, the historic Langban deposit consists of highly oxidized skarn bodies rich in iron and manganese hosted within metamorphosed carbonate rocks and volcanic formations. Active mining spanned several centuries from the Middle Ages through the 1970s, initially focusing on iron and later on manganese ore. Geological hydrothermal processes and complex high-temperature metamorphism created an astonishing variety of rare mineral species, turning the locality into a world-renowned haven for mineral collectors and scientists alike. Among its most famous type-locality minerals is magnetoplumbite, a dark gray to black, strongly magnetic lead iron oxide mineral that typically occurs as compact granular masses or small hexagonal tabular crystals within the oxidized manganese skarns.