Rosell Minerales

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RM785   Native bismuth

Viloque river, La Paz, Bolivia

These rounded nuggests are found nowadays in the bed of the river Viloque. They have been teared off from the mineralized veins by the glacial erosion and actually are found in gold placers. This piece is a classic example of these nuggets, intense silvery metallic luster, rounded by abrasion, and a good size for this locality. Native bismuth is known from many localities worldwide, but nuggets from Viloque River are the mostn known for the species.


Size: 1,9 x 1,4 x 1,3 cm. (10 g.)


RM652   Native copper

San Agustín Mine, Corocoro, Pacajes, La Paz, Bolivia

A very aesthetic copper specimen formed by laminar to arborescent forms, with rounded crystals and very aerial disposed. The color is natural, withouth chemical treatments, and it shows some luster. It comes from Bolivian mine, near CoroCoro, famous for pseudomorphs of native copper after hexagonal cyclic twins of aragonite, but these laminar shape is uncommon for locality.

Size: 6,5 x 5,1 x 4,4 cm.
Found in 2012.