Venus Mine, Sierra de Cordoba, Argentina (TYPE LOCALITY)
Small Cabinet, 6.5 x 4.0 x 2.2 cm
Ex. Philadelphia Academy of Natural Sciences
A specimen with microcrystals of Brackebuschite, from the type locality! These were found as far back as the 1880s and named after a prominent Argentine mineralogist. According to A rare secondary mineral occurring in the oxidized zones of hydrothermal Pb-Zn deposits. From the noted collection of William Drown, whom according to the Mineralogical Record Archive on him was an umbrella manufacturer who used his fortune to amass a collection of some 6000 mineral specimens. His collection was kept by his family for a generation after his death and then donated in 1918. There is a lot of descloizite in the material from here. The brackebuschite is in clusters of almost acicular crystals, very minute. Quite rare, and this would be cheap if the material is good (of which I am admittedly no judge)