Vezselyite

Formula: (Cu,Zn)2Zn(PO4)(OH)3 · 2H2O

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.