This is an oldtimer, showing classic twinned sphalerites with a dark but translucent yellow-brown color. The intersecting sphalerite twins are perched on quartz, and accented with sharp and brassy golden chalcopyrite crystals. A fine display quality specimen from this very old mining district, long in the Gene Meieran sulfide collection (his label dates it back more than 30 years).

Because we see so much more production from Naica, good Fluorite from the Zacatecas area is sometimes confused with material from the much more common locales in Naica, and I have found them on occasion mislabelled as such. This large display piece, however, has a decidedly non-Naica look to it. Naica produces octohedra, but not large purple crystals of this color; and the pagoda-like calcite is distinctive here also. This specimen is complete all around and shows off a great contrast of the small but brilliantly metallic chalcopyrite crystals perched upon the large fluorite octohedra. This is an oldtime specimen, and I have seen only smaller examples of the style for sale before. Ex University of Arizona Mineral Museum collection

A gorgeous and LARGE (6.5 inches tall!) silver specimen from this classic locality that looks like a cluster of striking snakes, coiled together. For size, it just bowls you over. Moreover, it is very beautiful not just for the overall form, but because it has a unique patina of minute bornite and chalcopyrite crystals that gives it a "sparkle" in person. It is very different in aspect, thus, from what you normally see. This is a MAJOR Kongsberg of a size we almost never see for sale on the modern market, like what exists only in the major museums by and large.