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

Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã Municipality, Castelo Branco District  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”