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Comparison of jasper tools with other material types.
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Comparison of jasper tools with other material types.

Credit: The State Museum of Pennsylvania

Native Americans used a variety of minerals to make stone tools. Here, from top to bottom, are stone drills, scrapers, knives, and projectile points (left to right) made from jasper, quartzite, black chert, and rhyolite. These artifacts were all found in Chester County.

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