Earth Tones
This image of a large sample of Seven Springs jasper with hematite illustrates some of the colorful earth tones found north of the Phoenix area. Jasper is a variety of silica-rich chert (quartz) with many impurities including iron oxide. Note that the actual size of this rock face is approximately 12 in by 18 in (20 cm by 45 cm)..
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Photographer: Thomas McGuire
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