EXB86CD6: Floater specimen formed of very shiny skeletal Pyrite crystals that partially cover a group of characteristic yellow Fluorite crystals from the Mina Moscona, as you can see on the back of the piece.
This specimen is very old, as this type of specimen was found at the beginning of mining, which began in 1978. A rarity.
Moscona Mine, El Llano, Solís, Corvera de Asturias, Comarca Avilés, Principality of Asturias (Asturias)  Spain (+1985)

Specimen size: 4.6 × 4.4 × 3.3 cm = 1.81” × 1.73” × 1.30”