Vauxite (outstanding color!) Sphalerite but the color and form

but the color and form make it a worthwhile thumbnail of this classic material

silver-grey crystallized “spray”

as the mine is a large commercial production

and the fact that there are THREE DISTINCT TWINS together

A very impressive and certainly hard to find GEM quality Cassiterite specimen from the famous Viloco Mine

Vauxite (outstanding color!) Sphalerite but the color and formA remarkable, very well crystallized, OUTSTANDING blue color, ridiculously rare specimen consisting of radiating crystal aggregates of Vauxite on clay matrix. I have photographed the crystals under the microscope to show that they are truly terminated crystals and not just a blue mass. I must point out that these crystals of Vauxite show the most electric neon blue color that I've seen for the species, but it appears that the rich color is due to a