Cylindrite
San Francisco Mine, Poopó, Poopó Province, Oruro, Bolivia
Out of nearly 5,800 mineral species this is the only mineral with a cylindrical crystal habit. Cylindrite is an uncommon lead tin iron antimony sulfosalt and this piece is from the type locality at Poopo, Bolivia and is from the Al Kidwell collection. Massive dark gray ore hosts splendent, diverging, dark gray crystals of cylindrite to nearly 3 cm ...
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