Paravauxite, Vauxite
Thumbnail, 2.3 x 1.5 x 0.8 cm
Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosi Department, Bolivia
This piece is a fine, very well crystallized, very rare specimen consisting of tabular blades of greenish-white Paravauxite on small, radiating, beautiful blue color aggregates of Vauxite with minor brownish-tan color Childrenite on white clay (probably decomposed Allophane) matrix. This piece is from the type locality for Vauxite and Paravauxite which were originally discovered along the Contacto and San Jose veins in this mine and first described by Sam Gordon and Mark Bandy. From the new find of 2009.