Mineral ID Day
Bring your most mysterious rocks, minerals, fossils, gems and meteorites to the Mines Museum of Earth Science and a panel of experts will try to identify them. The limit is three samples a person, and the museum does not appraise anything. Admission to the museum is free.
Also coming up in Golden
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Checked by James, October 7, 2026 against calendar.mines.edu. Times can change; the organizer’s page is the record. Report a correction · Know something opening or closing? Tell us