Iran stone news , As you know Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granites are usually medium to coarsely crystalline, occasionally with some individual crystals larger than the groundmass forming a rock known as porphyry with hard instinct . Granites can be white to dark gray or even black and pink or blue, depending on their chemistry and mineralogy. Granite has been extensively used as a dimension stone and as flooring tiles in public and commercial buildings and monuments . The granite industries involved in cutting, polishing and finishing have some common problems. Iran, Finland, Vietnam, Brazil, Mexico, India, are one of the major exporters of granite and a world-leader in soapstone production. granite usually formed in ocean plates.