Although it is impossible to permanently display the entire collection of 15,000 specimens, a large number are incorporated in the exhibits. At present, about 1,500 specimens are displayed in the Museum.

The Highland Centennial Gold Nugget, weighing 27,475 troy ounces, was recently donated to the Mineral Museum for permanent display. This very large nugget was found in September 1989 during placer mining in the Highland Mountains south of Butte. Also on display is a huge 400 pound quartz crystal.

A display of fluorescent minerals is exhibited in a separate room. Minerals in these cases are illuminated in both long and short wavelength ultraviolet light.
Two other cases deserve special mention. One is the exhibit of minerals from Butte, and the other is a display of some of the wide variety of minerals found in Montana.

The museum is open daily year round. Seasonal hours apply. There is no admission fee.