September 7th-12th, 2026

Monday - Saturday 10am - 6pm, final day 4pm

DoubleTree by Hilton Hotel Thornton 83 E 120th Ave, Thornton, CO 80233

Exclusively minerals and crystals. No beads, no jewelry, no distractions. Just the raw beauty and wonder of the mineral and crystal world.

For more than years, this iconic Denver event has been a must-attend for serious buyers. Each September, dedicated dealers and knowledgeable collectors form lines stretching out the door, eager to uncover the latest treasures and hidden gems that vendors have saved all year.

Many of our exhibitors treat this as their single biggest annual clearance event—offering deep discounts, one-of-a-kind specimens, and fresh inventory you won't find anywhere else.

Whether you're restocking inventory or building a world-class collection, this is where the real action happens.