TUCSON — The official event of the Tucson Rock and Gem Show will be held during the American Indian Arts Exposition on Jan. 28 to Feb. 11 at the 2830 Ranch (2830 S. Thrasher Ave.). The Southwest American Indian Collectors Expo is set for Feb. 23-25. Quality artists are invited. Information: www.usaindianinfo.com or 520-420-4332.