The annual Gem-O-Rama show in Trona, California attracts thousands of visitors each year to see rare crystals and minerals. The show, run by the local gem and mineral society, has grown significantly over the past 20 years according to organizers. An estimated 4,000 people now attend to see the crystals found in the solution mine tunnels and learn about the geology of the area. The small town of Trona relies heavily on tourism from this unique annual event.