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Pinal Geology and Mineral Society

The Pinal County Geology and Mineral Society (PGMS) meets every 3rd Wednesday September through May. PGMS holds nine informational and fun meetings a year, and usually has several field trips to collecting localities and other geological sites of interest. We have monthly email newsletter with articles and information.

The Society also runs the Pinal Geology and Mineral Museum.

It is a place where you can meet other rockhounds of all levels of experience, from those of us just starting our interest in rocks to professional geologists.

Everyone is welcome to join us

Founding and current President: Dr Ray Grant.


Meetings are held the third Wednesday at 7:00 pm at the Museum.

Recent meeting topics have included an overview of Mineral Location in Arizona, dinosaurs and other fossils, quartz, and Australian opals.

Meetings consist of a small amount of business and announcements, and a speaker or presentation. Refreshments, a silent auction, and door prizes! The gift shop is open for business before and after the meetings. Meetings usually last about 90 minutes.

Location: Meetings are held at the Pinal Geology Museum, 351 N Arizona Blvd, Coolidge, AZ (Location).

Sign for Pinal Geology Museum on N Arizona Blvd in Coolidge


Adults, families, children are all invited. Beginning hobbyists and seasoned professionals should find something of interest.

Open to the Public. Membership is not required to attend meetings!