Pennsylvania jasper, Berks County, Pennsylvania.
Type Jasper
Collection Location:
Jasper comes from the Hardyston Formation, generally found at the top of the formation. Jasper is most prevalent in the eastern portions of the formation, in discontiguous pods. The parent material is quartzite, with jasper formed by hydrothermal replacement. The sample was collected south of Bowers, Berks County, Pennsylvania.
Description
The jasper is commonly lustrous and waxy, red, yellow, and brown colors, often with veins of clear drusy quartz or coatings so botryoidal chalcedony (sometimes bright orange or purple). It can be homogenous in color and texture, brecciated, or display dendritic structures. It heat-treats well. High quality jasper grades into dull grainy material that was minimally exploited.
Distribution
Cultural Implications
References
Prepared By Ebright 1999
