California State Mining and Mineral Museum

The California State Mining and Mineral Museum is a museum of the state park system of California, United States. The museum exhibits and interprets the state's mineral resources and mining heritage. It is located in Mariposa, a city in central California, on the Mariposa County fairgrounds.

The museum houses a collection that was created in 1880, with the establishment of the California State Mining Bureau. Henry G. Hanks was the first California State Mineralogist and was tasked with managing the collection. The collection was housed in the Ferry Building in San Francisco until 1983. The collection was moved at the Mariposa County Fairgrounds in 1986. Responsibility for it was transferred from the California Department of Conservation to the California Department of Parks & Recreation in 1999. It is the only California State Park without associated land. The international collection holds over 13,000 minerals, rocks, gems, fossils, and historic artifacts.

Popular exhibits
Exhibits include the crystalline gold Fricot Nugget, weighing 201 troy ounces (6.25 kg), the largest found during the California Gold Rush; a working scale model of a stamp mill over 100 years old, demonstrating the process of extracting gold from quartz rock; and a replica hard rock mine tunnel that allows visitors to better understand California's hard rock mines.

The California State Mining and Mineral Museum has artifacts from the Mother Lode, along with international gems, stones, and other artifacts.

Closure proposal
The California Mining and Mineral Museum was one of the 48 California state parks proposed for closure in January 2008 during the Arnold Schwarzenegger Administration as part of a deficit reduction program.