Granite is a coarse grained crystalline igneous rock composed primarily of quartz and feldspar. It forms from slowly cooling magma that is subjected to extreme pressures deep beneath the earth's surface. Granite has become the counter top of choice for many of today's homeowners. Unlike laminates and solid-surface materials, a hot frying pan has no effect on granite's finish. The diamond-like hardness of granite makes it virtually impervious to abrasions, stains, and extreme heat. However, granite is indeed more porous than marble and certain types can stain if not protected with a good-quality impregnator-type stone sealer.