Granite is an igneous rock, formed mainly by the crystallization of once molten material under conditions of extreme heat and pressure. Commercially, various stones of volcanic origin with different characteristics from true granites, such as pegmatite, diorite, larvikytes (labradorite) and syenites, are sold as “granites”. The properties of granite, that make it the ideal stone surface, are its hardness and inherent resistance to acid which means granites are not ‘attacked” by the acids normally present in foods and cleaning products. Yet granite is a porous stone and requires proper sealing with a silicone based impregnator to prevent staining.