Galena, quartz, limonite and unidentified mineral

One excellent and very interesting cabinet size specimen of galena on mother rock, overgrown by clear quartz crystals, and later covered by limonite. Later, on galena and limonite crystalize unidentified secondary copper mineral  (probably result of weathering of chalcopyrite) with beautiful turquoise color. The specimen was found in the fault zone in the abandoned mine in conditions of intensive weathering with water, in the last 30 years.