An aesthetic, superb and old-time specimen of lustrous, transparent tarbuttite crystals to 5 mm nicely perched on matrix from the famous Broken Hill Mine of Zambia. Tarbuttite is a very rare zinc phosphate and Broken Hill is the Type Locality. This very fine piece comes with an outstanding, faded label from the 1929-1930 Philadelphia Academy of Sciences expedition led by the famous collector/mineralogist Samuel Gordon. Ex Richard Hauck Collection. This is an exquisite example of the species, with unusually sharp andf gemmy crystals. 3.4 x 2.2 x 2.1 cm