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Silicon, Chemical Element - structure, water, uses, elements .
Silicon is a metalloid, one of only a very few elements that have . Examples include sand, quartz, clays, flint, amethyst, opal, mica, feldspar, garnet, . English scientist Sir Humphry Davy (1778-1829) developed a technique for separating elements that tightly .. The aluminum industry uses large amounts of silicon in alloys.