The treasures included quartz-crystal arrowheads, obsidian from Wyoming, mica and obsidian from the Appalachians, copper and silver from the Great Lakes, conch shells and shark teeth from Gulf of Mexico, grizzly-bear molars from the Rockies, meteoric iron, alligator teeth, barracuda jaws and more.13 Most of these materials seem to have been used for the manufacture of ritual gear and magnificent costumes – including metal-sheathed pipes and mirrors – worn by shamans, priests and a host of minor officials in a complex organizational structure,
