NJ56AF2: Group of Chalcopyrite crystals on matrix. They are very bright, with fine striations on their faces and they are coated by Arsenopyrite micro-crystals and lenticular Siderite crystals.
The specimen has been photographed and published in the magazine ‘Paragénesis’, number 01/2017, page 86
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Region  Portugal (2004)

Specimen size: 7.7 × 6.2 × 3.8 cm = 3.03” × 2.44” × 1.50”

Main crystal size: 4 × 2.4 cm = 1.57” × 0.94”