Metro Week is looking at the impact of the gem shows on the Tucson metro area. We’ll cover the history, the economic contribution they make here, and the relevance to the mineral research community. Guests: Mark Barton, associate director of the UA Lowell Institute for Mineral Resources Marcus J. Origlieri, researcher, mineralogist, buyer/seller of gems Roundtable: Vanessa Barchfield, AZPM Thelma Grimes, Tucson Local Media TBD