DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Descloizite, a hydrated lead zinc vanadate, chemical formula (PbZn(VO4)(OH)). It is zinc rich and orthorhombic, forming tabular crystals coloured brownish red to grey or black. From Berg Aukas mine near Grootfontein, Namibia. Size 80mm.
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