31st Jan, 2007 to 5th Feb, 2007 at 198 South Granada Avenue, Tucson, United States Of America The Gem & Jewelry Exchange show will be held at 198 South Granada location in downtown Tucson, 31st January to 5th February, 2007. GJX is a “wholesale to the lapidary trade” show and limited to finished gemstones, jewelry, gem carvings and/or related lapidary equipment and packaging.