SV220NBX: Group of Pyrrhotite crystals with hexagonal outlines, fully pseudomorphed by small, but very bright, Pyrite crystals covering the old crystals of Pyrrhotite, and with small carbonate crystals scattered on top of the Pyrite crystals. This association of sulfides and carbonates is a classic of this old mine in the La Union mining district.
Tomasa Mine, La Fortuna, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia)  Spain

Specimen size: 8.4 × 6.5 × 4.4 cm = 3.31” × 2.56” × 1.73”

Main crystal size: 3 × 1.9 cm = 1.18” × 0.75”