“Reference: TGR14AN7 Stalactitic growths of Chalcocite covered by a thin film of Chalcopyrite, with dominant blue and magenta tones. The existing bibliography suggests that in some cases Chalcocite may be partially substituted by Djurleite. Tongshankou Mine, Edong, Daye, Huangshi Prefecture, Hubei Province  China (2019) Specimen size: 3.4 × 2.5 × 2.2 cm = 1.34” × 0.98” × 0.87” Main crystal size: 0.7 × 0.3 cm = 0.28” × 0.12” ”