Meteorites, Trilobites, and More . . . at the Tuscon Gem & Mineral Show By Sheri Quinn & Suzi Montgomery • Feb 24, 2012 ShareTwitter Facebook Google+ Email Tuscon Gem & Mineral Society Poster Science Questions profiles the largest international gem fair in the world in Tuscon, Arizona -- a bustling marketplace where meteorites, trilobites, and rare gems are showcased. Related Program: Science QuestionsView the discussion thread.