NF28AM5: Very sharp crystals of Chalcocite that form hexagonal cyclic twins with well defined faces and edges. They are flattened, with bright luster, and are on matrix with Calcite crystals. The specimen comes from the first finds in this mine and is from the Ignacio Gaspar collection (number CAC-8), whose collection file we will send to the buyer together with a copy of the analysis.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (±2011)

Specimen size: 5 × 3.5 × 4 cm = 1.97” × 1.38” × 1.57”