Jamesonite
Porvenir mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
12.7 x 11.4 x 3.7 cm. Mineral specimens are very rare from this old, extinct Sn-Ag-Zn deposit mined in the early 20th century. It is now mostly covered up by tailings from the neighboring Huanuni tin mine (MINDAT). This is a massively heavy specimen of pure jamesonite, with flat-laying lustrous, metallic acicular crystals atop ore, from one of the ...
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