The San Diego Mineral & Gem Society (SDMG) is a nonprofit organization dedicated to promoting interest and education in mineralogy, gemology, and the lapidary arts. Based in San Diego, CA, SDMG offers educational classes, field trips, and workshops for rockhounds and gem enthusiasts of all ages. The society hosts regular meetings, sponsors gem and mineral shows, and maintains a museum to showcase mineral and gemstone collections, fostering a community for those passionate about earth sciences and the decorative arts.
