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Rocks are used all around us in many different ways. In the classroom, students use rocks everyday. Graphite, a metamorphic rock, is the part of the pencil used for writing.Slate, another metamorphic rock, was used to make blackboards in years past.Now most blackboards are constructed of man-made materials. Chalk is a soft form of limestone which is a sedimentary rock.ocks are used all around us in many different ways. In the classroom, students use rocks everyday. Graphite, a metamorphic rock, is the part of the pencil used for writing.
Best Answer: Granite, shale, and limestone, are used on the outside of homes and other buildings. Graphite, a metamorphic rock, is the part of the pencil used for writing.Marble is used in decorative ways in homes, other buildings, and gravestones.Some rocks are classified as gems and, as such, are used in jewelry. Talc is used in bath powders.Halite, salt, is used in food preparation and on icy roads.est Answer: Granite, shale, and limestone, are used on the outside of homes and other buildings. Graphite, a metamorphic rock, is the part of the pencil used for writing.