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All rocks contain minerals. for example, table salt has minerals, and diamonds  have minerals too.

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Metamorphic rock are formed when minerals change by hot magma, by heat or by pressure.

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edimentary rocks are  formed when soil and rock are driven away by nature, and are compacted then  liquids dry up and become sedimentary rock.

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an igneous rock is formed when magma rises to the surface and hardens over time.