Sorosilicate (Si2O7 groups), manganese-bearing mineral
Specific gravity: 6.55 to 6.72
Colour: White to pinkish white, darkens on exposure to light
Solubility: Gelatinises in hydrochloric acid
Common impurities: Al,Fe,Zn,Mg,Ca
At the type locality, the Harstigen Mine, Pajsberg, Persberg ore district, Filipstad, Värmland County, Sweden, barysilite occurs in iron ore (HOM).
At the Franklin Mine, Franklin, Franklin Mining District, Sussex County, New Jersey, USA, barysilite occurs as thin fllms and veinlets in a metamorphosed zinc orebody, associated with garnet, willemite, axinite and hardystonite (HOM).
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