JFD52AN8: Floater crystals of Sphalerite, Pyrite and Marcasite in a Quartz “aquarium”, with Siderite on the outside associated with these sulphides.
The imposing Quartz rises and carries all of the others both inside and out.
The historic Zé da Tropa found personally this piece the same day than I bought it at the 'Escritorio' of the mine.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Region  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”