Phosphosiderite, Stewartite, Hureaulite, Rockbridgeite
Specimen ID: DFX-L6M
Phosphosiderite : FePO4·2H2O
Stewartite : Mn2+Fe3+2(PO4)2(OH)2·8H2O
Hureaulite : Mn2+5(PO3OH)2(PO4)2·4H2O
Rockbridgeite : Fe2+Fe3+4(PO4)3(OH)5
Photo added to mindat.org
“Lavender blue phosphosiderite, yellow stewartite and reddish hureaulite on rockbridgeite (Fe/Mn = 11,34).
Probably collected about 1825. Old label mentions: " vivianite, dufrenite et hureaulite, Les Hureaux, H.V".
Vivianite is, in fact, phosphosiderite and dufrenite is rockbridgeite.
Collection and photo Jean-Marie Boisson. ”
Jean-Marie BOISSON - 6th February 2018
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