Hillman Hall of Minerals and Gems

Pennsylvania Minerals

Pennsylvania's complex geologic history is reflected in the great variety of minerals found within the state. Nearly 300 mineral species are known from Pennsylvania. 

Pennsylvania's relatively rugged topography promotes exposure of rocks in naturally eroded cliffs as well as in cuts for roads and railroads, but the most significant mineral specimens have been found as a result of mining and quarrying activities.

The specimens displayed in Hillman Hall represent some of the finest found in Pennsylvania. In addition to the Pennsylvania Minerals & Gems exhibit, there are 2 cases of Pennsylvania minerals on display in Masterpiece Gallery.

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Quartz
Schuylkill County, Pennsylvania
Photo: Debra Wilson
  Calcite
York County, Pennsylvania
Photo:  Harold & Erica Van Pelt
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