Magnussonite with Allactite on Hausmannite-Dolomite ore
Langban mine, Filipstad, Varmland, Sweden
Cabinet, 7.0 x 6.5 x 2.0 cm
Ex. Paulo Matioli; Swedish Museum of Natural History

A very good specimen of hausmannite-dolomite ore exhibiting a fracture surface coated with relatively coarse, inter-grown blades of dark pink allactite and scattered patches of emerald green magnussonite. Allactite is an uncommon manganese arsenate hydroxide. From Langban, Filipstad, Varmland, Sweden, the type locality for magnussonite, a manganese arsenite. Ex. Paulo Matioli and Swedish Natural History Museum collections with labels.