MR27AM3: Group of large Chalcopyrite crystals with the typical curvatures seen in Panasqueira specimens, very aerial, lustrous, and on matrix. With sharp and lustrous Arsenopyrite crystals and small coatings of lenticular Siderite crystals. As a whole, it is a very high level piece both for its perfection and for the quality of the Chalcopyrite crystals, a species that in this mine does not usually yield very good specimens.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal
Specimen size: 13.1 × 10.4 × 7.1 cm = 5.16” × 4.09” × 2.80”
Main crystal size: 5 × 3.3 cm = 1.97” × 1.30”
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