The Colorado Minerals, Fossils & Gems Show returns to the Denver Coliseum from September 11–20, 2026, inviting visitors of all ages to explore one of Colorado’s most exciting celebrations of minerals, fossils, gemstones, jewelry and natural history.
Spanning the Denver Coliseum and surrounding outdoor tents, the 10-day event will feature more than 300 exhibitors from around the world offering minerals, fossils, meteorites, crystals, gemstones, handcrafted jewelry, lapidary art, beads, carvings, metaphysical products and unique collector specimens. Admission and parking are free, making the show an accessible and family-friendly destination for longtime collectors, science lovers, wholesale buyers and everyone in between.
New for 2026, CMFGS is introducing a free shuttle service to help visitors move more easily between entrances and the many focal areas in and around the Coliseum. The new transportation option, with various planned stops, is designed to make the overall experience more convenient and enjoyable for guests to navigate and shop the show with ease.
One of this year’s most anticipated attractions will be the debut of a remarkable 65-foot-long Diplodocus skeleton display inside the special dinosaur exhibition area on the lower level of the Denver Coliseum. The enormous sauropod joins an impressive lineup of prehistoric displays featuring Tyrannosaurus, Utahraptor, Spinosaurus, Carcharodontosaurus, Tarbosaurus and Deinonychus skeletons, creating an unforgettable experience for dinosaur enthusiasts and families alike.
Visitors will also have the opportunity to explore the popular Miners Co-Op section, where miners, prospectors, and artisans share material they personally collect, mine, and prepare. From rough gemstones and mineral specimens to fossils, petrified wood, and handcrafted jewelry, the Miners Co-Op offers a chance to connect directly with the people behind the discoveries and hear the stories that make each piece unique.
The Denver Coliseum provides more than 300,000 square feet of exhibition space across multiple levels and outdoor tents, creating an expansive yet welcoming environment to browse, learn and discover. Visitors can expect everything 65-foot Diplodocus skeleton debut – Level 1 dinosaur exhibition Mineral specimens from around the world from affordable treasures and gifts to museum-quality specimens and rare collector material.
Organized by longtime mineral show participants David Guery and wife Logan Layton, alongside veteran promoter Heather Grana Monahan, the event was created to build a vibrant minerdirect marketplace paired with an engaging and accessible public experience.
Each year, the organizers continue to refine and expand the show based on valuable feedback from both exhibitors and attendees.
Whether you are searching for a rare crystal, shopping for handcrafted jewelry, learning about dinosaurs or simply spending the day exploring with family and friends, the Colorado Minerals, Fossils & Gems Show offers something for every level of interest and curiosity.
Visitors can enjoy:
- Minerals and crystals from around the world
- Museum-quality fossils and meteorites
- The new 65-foot Diplodocus skeleton exhibition
- Dinosaur displays and educational exhibits
- The expanded Miners Co-Op marketplace
- Fine jewelry, gemstones, and artisan creations
- Free admission, free parking and complimentary shuttle transportation
- Retail and wholesale buying options direct from the source
The Colorado Minerals, Fossils & Gems Show runs daily from 9 a.m. to 6 p.m. at the Denver Coliseum, located at 4600 N Humboldt Street in Denver. Additional information, exhibitor details, interactive maps and visitor updates are available athttps://colorado.show/
