Many Other Quartz Sand Uses
Quartz sand is used as a filler in the manufacture of rubber , paint and putty . Screened and washed , carefully sized quartz grains are used as filter media and roofing granules . Quartz sands are used for traction in the railroad and mining industries . These sands are also used in recreation on golf courses , volleyball courts , baseball fields , children ' s sand boxes and beaches .
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Uses of Quartz Crystals
High quality quartz crystals are single-crystal silica with optical or electronic properties that make them useful for specialty purposes . USGS estimates that about ten billion quartz crystals are used every year .
Electronics grade crystals can be used in filters , frequency controls , timers , electronic circuits that become important components in cell phones , watches , clocks , games , television receivers , computers , navigational instruments and other products . Optical-grade crystals can be used as lenses and windows in lasers and other specialized devices . Although some natural quartz crystals are used in these applications , most of these special crystals are now manufactured .
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