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Most quartz is a lasting souvenir of the volcanoes, which melted silica, which is then carried by water into crevices, where it crystallizes. Quartz is silicon dioxide. Such quartz often includes traces of other minerals picked up by water flowing underground. The Star Blue Quartz in Alabama contains microscopic inclusions of amphibole minerals and occasionally exhibits asterism. Plus there are many varying colors of Quartz in most of the States in America, and some have also named Quartz as their State gemstone; New Hampshire has smokey Quartz, South Dakota rose Quartz and Georgia clear Quartz. Once dug up, Quartz is made into glass, eyeglasses, electrical components, abrasives, gemstone jewelry and building stone, called granite, slate and marble. There is a little bit of quartz in every rock. .

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