Doubly terminated Quartz with Arsenopyrite and Muscovite

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

Specimen size: 6.7 × 5.3 × 2.2 cm = 2.64” × 2.09” × 0.87”
Main crystal size: 6.7 × 2.5 cm = 2.64” × 0.98”