This specimen features an intergrown nest of lustrous, light-green color Paravauxite crystals associated with spherical micro crystallized iron-stained Wavellite needles on matrix. The largest Paravauxite crystal measures up to 0.4 cm. The Siglo XX mine (Twentieth Century mine) in Llallagua, Bolivia is one of the most prolific localities, and one of the greatest tin mines in all of Bolivia and the world. This is an unusual ore deposit because of the fact that high temperature metallization took place at such a shallow depth. This mine is truly one of the most unique localities in the world from the standpoint of mineralization. This mine is the type locality for this species 4.6 x 3.2 x 1.6 cm