Specific gravity: 2.797
Colour: Green, brown, yellow, red. Light brown in transmitted light.
Solubility: Soluble in hydrochloric acid. Green crystals immersed in ammonia turn red and revert to the original green colour when reimmersed in dilute hydrochloric acid.
Pharmacosiderite is a secondary mineral occurring in the oxidised zones of iron-bearing sulphide deposits or in
Pharmacosiderite alters to limonite and manganese oxides, and
forms pseudomorphs after siderite.
Common impurities: P
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