Superb Franckeite thumbnail specimen

Item Description

A superb and adorable franckeite thumbnail from this well-known mine, noted for outstanding uncommon sulfosalt species. Franckeite is a rare complex Fe-Pb-Sn-Sb sulfosalt. The very sculptural L-shaped intergrown balls are composed of lustrous, dark metallic-gray tabular prisms. The out-of-sight attachment is at the base of the 'L'. Franckeite specimens of this quality and aesthetic form certainly rank as some of the finest in the world. Old material, ex Kay Robertson Collection