Fluorite With Calcite and Chalcopyrite
San Martin Mine, Sombrerete, Zacatecas, Mexico
Cabinet, 11.1 x 10.3 x 9.2 cm
Ex. University of Arizona

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 mislabeled 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