Quartz with inclusions of sulphides and with Siderite, Sphalerite, Marcasite and Muscovite

Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (07/07/1997)

Specimen size: 18.3 × 9.3 × 7.2 cm = 7.20” × 3.66” × 2.83”
Main crystal size: 10.4 × 4.7 cm = 4.09” × 1.85”