Lake Havasu Museum of History is the home ofHavasu Rocks & Lake Havasu Gem and Mineral Society About LHGMS The Lake Havasu Gem & Mineral Society of Lake Havasu City, Arizona is a non-profit organization, dedicated to educating our members and the community about gems, minerals, and fossils. Learn More Havasu Rocks Presented by the Lake Havasu Gem and Mineral Society. Find beautiful crystals, geodes, cabochons, fossils, lapidary slabs, jewelry & more. Located inside Lake Havasu Museum of History. Learn More Field Trips Field trips are usually weekly, during late Fall through early Spring. Most are on Sundays or Mondays and are one day in duration, although there are some overnight trips. Learn More Lapidary Shop A teaching environment with state-of-the-art machinery. Located just a few doors down from the museum at London Bridge Plaza. Learn More Gem Show Every year during the second weekend in November, the Society hosts its annual Gem & Mineral Roundup in Lake Havasu City, Arizona. Over our 2 day show many dealers come and display their quality jewelry, gems, and mineral. Our club members present their beautiful and educational display cases. Learn More