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Granite is Igneous rock. It crystallizes from hot melt (magma). Metamorphic rocks can be found associated with granite as result of their contact with country (surrounding) rocks. This will be a contact metamorphism. Metamorphism of granite it self results into granitic gneisses which are coarse foliated rocks.
The light and dark bands are alternations of felsic vs. mafic layers. Gneiss is composed of high temperature minerals such as quartz, feldspar, and biotite (as in granite and other igneous rocks). Non-foliated Metamorphic Rocks. Marble is metamorphosed limestone composed of recrystallized and interlocking calcite or dolomite crystals.