Vezselyite
Formula: (Cu,Zn)2Zn(PO4)(OH)3 · 2H2O
Species: Phosphates
Colour: Green, blue, greenish blue, dark blue; greenish blue in transmitted light
Lustre: Vitreous
Hardness: 3½ – 4
Specific Gravity: 3.4
Crystal System: Monoclinic
Name: Named after Ágost Veszely (1821-1879), Hungarian mining engineer, who discovered the species.
Type Locality: Ocna de Fier, Caraş-Severin County, Romania
The P analogue of arsenoveszelyite. A rare secondary Cu-Zn mineral occurring in the oxidised zones of base metal deposits.