Many archaeologically recovered lithic materials tend to be erroneously categorized during the cataloguing process.  These decisions often occur due to limited comparative collections, misunderstanding of regional geological formations, and only well-known types being published in the literature.  Furthermore, some archaeological rocks and minerals look very similar superficially, and without geochemical testing, can be misidentified.  Since the range and variability of lithic raw materials is not well known to many individuals, it can be difficult to properly identify them if tools are made from either a local or distant source.  In order to gain a better understanding of the range and variability of lithic raw materials, this session will provide an opportunity for attendees to do an informal presentation about their region, bring local materials to display, discuss, and exchange, as well as participate in a flintknapping workshop.  Attendees are encouraged to bring labeled specimens for exchange, unidentified stone artifacts for some opinions on material type, and flintknapping kits.