Granite is a deep magma mound with a granular appearance composed of hard crystalline minerals. Granite; Plutonic rocks in which the grains are large enough to be seen with the naked eye. Main minerals of granite; orthoclase, feldspar, small amounts of plagioclase and quartz. There are also minerals such as mica, hornblende, pyroxene, apatite, zircon, garnet, magnetite.