Formula: Cu5(PO4)2(OH)4 Monoclinic
Description:
Pseudomalachite is a green hydrated copper phosphate formed as a secondary mineral in the oxidized zone of copper deposits.
RUSK COUNTY: Pseudomalachite occurs as rare masses and spherical rosettes of drusy crystals in the oxidized zone of the Flambeau Mine, Ladysmith (Buchholz, personal communication).