Libethenite

Libethenite is a rare cooper phosphate hydroxide mineral. It forms striking, dark green orthorhombic crystals. It was discovered in 1823 in L’ubietova, Slovakia and is named after the German name of that locality (Libethen).

It has also been found in Monterbas, (France), Cornwall, (Great Britain), Yerington-Nevada (USA), Nizhni Tagil (Russia), and has this piece is from, Shaba, Congo.