Granite, Coarse-grained rock that is hard., Marble, A rock that is used to make floor tiles and wall tiles., Igneous Rocks, formed when magma cools and harden, Examples of igneous rocks, Include basalt, granite, Metamorphic Rocks, change their structure under high pressure, Examples of metamorphic rocks, Include marble and gneiss, Sedimentary rocks, formed by sediment that is deposited usually as layers at the bottom of oceans., Examples of sedimentary rocks, sandstone, chalk, coal and clay, Sandstone, contains minerals and very hard

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