$400.00 €365 £310.00 approx. This specimen is priced in US dollars, all other prices are approximate.
A great thumbnail of the rare Pb-Cu-Fe-Zn phosphate Gartrellite, forming tiny light pistachio-green botryoidal mounds over the surface of a sliver of opaque milky Quartz. Following its discovery at Tsumeb, this mineral remained uncharacterised and was catalogued under the ‘unknown’ suite as ‘Mineral Gamma’; eventually being as identified as Gartrellite.