Where to Find Jasper in Pennsylvania

Pennsylvania jasper concentrates around the Hardyston Quartzite outcrops of the Reading Prong, which crosses Lehigh, Berks, and Northampton counties. The Macungie and Vera Cruz areas yield red and yellow jasper in conglomerate form, the source rock for the famous Lehigh Valley jasper-tipped Native American tools. Smaller showings turn up in the South Mountain area near Carlisle (Cumberland County) and along the Susquehanna highlands. Jasper conglomerate (also called puddingstone) is the distinctive Pennsylvania variant, with jasper pebbles set in quartzite matrix. Surface collecting is mostly on roadcuts and creek beds; active quarry access requires permission. The most productive ground is in Macungie and Vera Cruz (Lehigh County), Hardyston quartzite belt (Berks County), South Mountain (Cumberland County).

Casual hand collection of common rocks and minerals like jasper is allowed on most BLM and U.S. Forest Service land in Pennsylvania, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always confirm rules before a trip.

Macungie and Vera Cruz (Lehigh County) is the standout. Other strong ground includes Hardyston quartzite belt (Berks County), South Mountain (Cumberland County).