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What is mica? Mica is from the silicate class of minerals. Mica is also known as Muscovite, Biotite, Phlogopite, and Lepidolite. The group of micas are known for their extremely flaky rock characteristics, also known as cleavage. Where can you find mica? Mica, both scrap and flake, can be found all over the world. In the United States, mica is produced in Arizona, North Carolina, South Dakota, Georgia, New Mexico, and South Carolina. The production in North Carolina accounts for half of the total U.S. mica production. What is mica used for? Mica can be used in many household products. One specific use of mica is in gypsum wallboard joint compound, where it acts as a filler and extender. It provides a smoother consistency, improves workability and helps to prevent cracking. Also, in the paint industry, ground mica is used as a pigment extender and facilitates suspension due to its lightweight anatomy. The ground mica also helps prevent shrinkage and shearing of the paint film,
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