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File:Quartz sand particles.jpg

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English: Quartz sand particles. The primary component of typical beach sand is quartz, or silica (SiO2). Quartz is a hard mineral which, not having any cleavage planes, does not fracture easily. Quartz is found in many types of rocks.~ USGS
Date 18 September 2012, 05:58:24
Author United States Geological Service


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