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Stewartite & Phosphosiderite

Phosphosiderite

Formula: FePO4 · 2H2O
System: Monoclinic
Colour: Purple to reddish ...
Lustre: Vitreous, Resinous
Hardness: 3½ - 4

 Stewartite
Formula: Mn2+Fe23+(PO4)2(OH)2 · 8H2O
System: Triclinic
Colour: Yellow to brownish yellow
Lustre: Sub-Vitreous, Resinous, Silky

Locality: Regada, Cubos-Mesquitela-Mangualdearea, Mangualde, Viseu District, Portugal.

Photography by Yaiba Sakaguchi.

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