Mineral: Arsenopyrite, Marcasite, Siderite, Muscovite
Locality: Minas da Panasqueira, level 0, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
Dimensions: 7.3 × 6.9 × 3.8 cm

Description: Detail of arsenopyrite and marcasite.

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