ARSENOPYRITE, SIDERITE, MARCASITE, MUSCOVITE, CASSITERITE

This specimen is very interesting for the number of species represented in. A huge size group of yellowish siderite crystals partially included in a matrix with very sharp and aerial prismatic arsenopyrite crystals. Accompanied by muscovite and brilliant marcasite crystals. We would like to emphasize the presence of a small group of cassiterite crystals with good color and transparence. A complete sample from this classic Portuguese mine.