NE11AL4: Very sharp Chalcocite crystals that form hexagonal cyclic twins with well defined faces and edges, flattened, lustrous, on matrix, with tetrahedral crystals of antimony-rich Tennantite-(Fe) and coatings of botryoidal pyrite. The specimen has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain

Specimen size: 6.5 × 4.4 × 2.7 cm = 2.56” × 1.73” × 1.06”

Main crystal size: 0.1 × 0.1 cm = 0.04” × 0.04”