Hart Gem Shows, operated by Hart Events, organizes large-scale gem, mineral, fossil, and jewelry shows across the United States. The brand brings together collectors, dealers, jewelers, designers, museums, industry professionals, and the public to explore a wide range of natural specimens and finished goods. Its events include the Tucson Gem Show on 22nd Street, the NJ Gem Show in spring and fall, and the Denver Gem Show.

Exhibitors can apply for booth space, with opportunities to reach collectors and buyers across multiple cities; Hart Events also offers sponsorship opportunities and professional marketing support. Visitors can find minerals, fossils, gemstones, jewelry, beads, lapidary items, décor, wholesale merchandise, and distinctive treasures. Hart Events describes its shows as opportunities for both exhibitors and attendees, with a focus on creating engaging experiences and supporting the gem and mineral trade.

In September 2027, the Denver Gem Show is scheduled to move to the National Western Center, where Hardrock Summit will also be held, bringing two distinct shows together at one campus while retaining their individual identities