NG37AL4: Very sharp Chalcocite crystals, twinned, with well defined faces and edges, flattened, shiny, and on matrix. 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: 4.7 × 2.7 × 2.3 cm = 1.85” × 1.06” × 0.91”

Main crystal size: 0.6 × 0.4 cm = 0.24” × 0.16”