GeoKansas--a place to learn about Kansas geology

Jasper

Hardness: 7

Jasper is a variety of quartz, which is the mineral silicon dioxide (SiO₂). Jasper is a granular cryptocrystalline quartz that is usually colored red from inclusions of the mineral hematite.

The sample pictured above is from Phillips County, Kansas

Sources

Klein, Cornelis, 1993, Manual of Mineralogy (after James D. Dana), 21st Edition: New York, Wiley, 681 p.

Unless noted otherwise, illustrations by Jennifer Sims, Kansas Geological Survey; photographs by John Charlton, Kansas Geological Survey; text by Liz Brosius, Kansas Geological Survey.

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Kansas Geological Survey Updated May 12, 2005 Website Terms of Use Comments to webadmin@kgs.ku.edu http://www.kgs.ku.edu/Extension/KGSrocks/jasper_def.html