Image Credit: Malcolm Southwood
Image Credit: Malcolm Southwood
Specimen Title
Malachite after azurite (on Cu-Pb arsenates)
Associated Minerals
azurite; bayldonite (?); smithsonite
Principal Mineral
Precursor Mineral
Size
Cabinet; 50mm
Location in the Mine
First oxidation zone (?)
Provenance
Gardner, A.E.
Collection
Geoscience Australia; R22262
Entry Number
Specimen; TSNB867
Description
A curved, shell-like crust, labelled as "bayldonite" but probably a mixture of Cu-Pb arsenates (?). The convex side of the specimen (Exhibit 1) is largely covered with malachite pseudomorphs after azurite. The concave face (Exhibit 2) is frosted with a druse of sparkling green smithsonite crystals and a single crystal (8 mm) of unaltered azurite.
Formerly number 262 in the Reverend A.E. Gardner Collection which was purchased by the Australian Bureau of Mineral Resources (now Geoscience Australia) in 1974. There is no record of earlier provenance or location in the mine, but the paragenesis of strongly indicative of the upper part of the first oxidation zone.
