Quartz sand particles.jpg
en
Quartz sand particles, Beaches of unidentified countries, Sand
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Quartz sand particles, 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
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ja
石英砂粒子、未確認国の海岸、砂
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ja
石英砂粒子、石英砂粒子。典型的な砂浜の主な成分は石英である。石英は硬い鉱物で、開裂面を持たないため容易に割れない。クォーツは多くの種類の岩石で見られる... USGS
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sand particle chickadee