galena (w. sphalerite)

sphalerite

Silicified dolostone breccia with disseminated sulphide mineralisation consisting principally of galena and sphalerite, the latter intensely orange-yellow fluorescent in short wavelength ultraviolet radiation.

This specimen was collected by Charles Palache of Harvard University, on 7 April 1922 during an underground visit at Tsumeb at the time of the Shaler Memorial Expedition to South Africa. It carries a Shaler Expedition label (Exhibit 2) with a field number – 13955 – in addition to its MGMH catalogue number.