Colorado mineral and fossil show returns Sept. 9-14 with rare gar fossil and elite dealers

The Colorado Mineral & Fossil Fall Show returns to Northglenn, Colorado, from Sept. 9-14 with free admission, free parking and a lineup led by Wendy's Minerals and Tynsky's Fossils. The event is a key stop for collectors because it combines rare specimens, fossils and gemstones with a long-running Denver-area show tradition.

Why it matters: - The Colorado Mineral & Fossil Fall Show brings together dealers, collectors and enthusiasts from across the mineral, fossil and gem market. - The free show gives access to rare specimens, educational exhibits and buying opportunities for both retail and wholesale attendees. - The event continues a Denver-area tradition tied to Marty Zinn, who helped establish the city as a hub for minerals, fossils, gemstones and home decor.

What happened: - RMGM Promotions is hosting the Colorado Mineral & Fossil Fall Show at the Delta Hotels Denver Thornton from Sept. 9-14, 2026. - The show runs daily from 10 a.m. to 6 p.m. and closes at 5 p.m. on Sept. 14. - Admission is free and parking is free. - Wendy's Minerals is the featured dealer for the show. - Tynsky's Fossils, Inc. returns with a headline fossil find.

The details: - Wendy's Minerals is run by Wendy and John Zhou and has focused for more than 30 years on investment-grade and collector-level Chinese mineral specimens. - The business uses a direct source, mine-to-market model that Wendy says supports clear provenance and quality. - Wendy Zhou built the company after growing up around her geologist father's collection and later working as a geologist herself. - Wendy's Minerals will be at Booth C-27 in the lower level of the Convention Center. - The booth will feature newly discovered rhodochrosite specimens, gemmy sphalerites, cerussite specimens and fluorites. - Tynsky's Fossils, Inc. has quarried the Wyoming Green River Formation since the 1960s, when Sylvester "Switz" Tynsky and his sons began the operation near Kemmerer, Wyoming. - The Tynsky family discovered the first complete Eohippus, or "Dawn Horse," now on permanent display at the Smithsonian. - Tynsky's Fossils will debut a 68-inch Atractosteus atrox, known as the "ferocious gar," recovered in 2025 by share diggers Beth and Alec Hovagim. - The fossil has an 18-inch skull and an estimated life weight of 60 to 70 pounds. - The specimen is described as the largest and rarest fossil lake gar recovered from the Green River Formation. - The fossil took seven months to prepare. - Tynsky's Fossils will also show a baby Echmatemys sp. fossil turtle. - Tynsky's Fossils, Inc. will be in the Atrium of the Delta Hotel, space A-5. - The show includes a global mix of retail and wholesale dealers with rare gemstones, fossils, meteorites, opals and fine jewelry. - The event is designed to welcome newcomers, families, students, hobbyists and serious collectors. - Attendees booking the show's group rate at the Delta Hotels Denver Thornton get convenient access to the venue and the wider show community.

Between the lines: - The featured-dealer lineup leans into provenance and rarity, two of the biggest drivers in mineral and fossil collecting. - Wendy's Minerals represents the supply side of the market, with Chinese mineral specimens and source transparency as the selling points. - Tynsky's Fossils represents the specimen side, where discovery history and preparation work add value to a standout fossil. - The show is trying to serve both serious collectors and first-time visitors, which broadens its appeal beyond a niche buying audience.

What's next: - Collectors and buyers can visit the show throughout the week at 10 E. 120th Ave. in Northglenn, Colorado. - RMGM Promotions is promoting the show through Sandra Gonzales, with additional event information available at more information. - The featured specimens will be on display during the Sept. 9-14 run, with the show closing at 5 p.m. on the final day.

The bottom line: - The Denver-area show is positioning itself as a free, high-traffic gathering for rare minerals and fossils, anchored by two dealers with deep track records and one headline specimen that stands out even in a crowded collecting market.