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Mineral - Wikipedia, the free encyclopedia A mineral is a naturally occurring solid chemical substance that is formed through geological processes and that has a characteristic chemical composition, a highly ... en.wikipedia.org/wiki/Mineral Rocks, Minerals and Crystals for Earth Science Fun Information, activities, and lesson plans on rocks, minerals, and crystals designed for students and teachers. Keywords: rocks and minerals , crystals www.rocksandminerals4u.com/ Submit Site to the Minerals Directory |