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Crystals are found everywhere. Most rocks are made of them and mostly all the sandy beaches are actually billions of broken crystals of Quartz. Quartz is a type of mineral, which is a substance found in rocks, soil and sand. Even the sugar and salt that is used in the kitchen are crystals. Some of the most beautiful crystals may be cut and polished to be used as gemstones. These gemstones are used in jewellery or for decoration. Precious crystals or stones are the crystals that are rarely found so they are expensive.
