Stephanite
Porco, Agua de Castilla, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
1.7 x 1.3 x 0.8 cm. Recently, a small discovery of the silver antimony sulfide, Stephanite was made at the classic Porco mine in Bolivia. This particular specimen is a prismatic, somewhat blocky group of sharp, lustrous, silvery metallic, somewhat striated, orthorhombic crystals. The mine at Porco is the oldest and most significant Silver mine in ...
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