ChalcopyriteThe Alice Mine is one of the most classic of all the Colorado localities for Chalcopyrite. It is renowned for its superb Chalcopyrite specimens, exhibiting some of the finest twins for the species extant. The Chalcopyrites from this mine are a staple of any good Colorado mineral collection. This specimen features good sized, sharp, metallic, brassy gold colored twinned crystals of Chalcopyrite coated by micro epitaxial cubic Galena(?), as there is

particularly those from the famous Siglo XX mine are among the best in the world due to the fact that they occur with eye-visible spheres that are often very well crystallized and not broken in half

undamaged Brookite thumbnails like this from any locality

If you’re a Sphalerite collector or a Bolivian mineral collector

Specimen # BOL711B206

This is an aesthetic specimen from this classic Bolivian locality

colorful minerals

but it’s definitely different than typical pieces from Viloco

fine quality

Specimen # AMBER51704

and the faces on the Magnetite crystals are rather smooth and shiny with good isolation between the crystals

I honestly have never seen any specimens from this locality before

A soft greenish-grey colored prismatic crystal of Amazonite associated with a white "rosette" of Cleavelandite on the side