Electric-blue Veszelyite Crystals
Electric-blue Veszelyite Crystals. Credit: Christian Rewitzer

A rare secondary Cu-Zn mineral occurring in the oxidised zones of base metal deposits. Veszelyite is a rare phosphate and this beautiful specimen is richly sprinkled with sharp, dark electric-blue veszelyite crystals.
Formula: Cu2+3PO4(OH)3·2H2O
System: Monoclinic
Colour: Green, blue, greenish ...
Hardness: 3½ - 4

From: Laochang Mine, Gejiu County, Yunnan Province, China