Boleites are just so doggoned hard to find for sale; there were never that many in the first place. First identified here at the type locality in the copper mining district of Baja California, they are pseudocubic twins that form these sharp cubes with gorgeous blue color (chemical formula Pb26Cu24Ag10Cl62(OH) 48 - 3H2O). This is a pretty decent size for one of these rare crystals. The display side shows three interpenetrating cubes with high luster; the back is a concave contact.