Woman posing with the Irwin-Ainsa (Tucson ring) meteorite at the Smithsonian Museum of Natural History, Washington, D.C. This Tucson meteorite is a brezinaite meteorite fragment. It was claimed by Jesuit missionaries at the foot of Sierra de la Madera in the 1700s and eventually transported to Tucson, Arizona, where it was used as a kind of public anvil. Brezinaite is a rare mineral composed of chromium and sulfur, found in meteorites. Harris & Ewing, photographer, c. 1938-39 Stock Photo