This above-Counter Basin is a rectangular sink carved from natural granite. It is polished inside and out to accentuate the natural highlights of the stone. It is both, a fashionable and durable addition to your bathroom. Granite forms as molten rock slowly cools deep underground, allowing crystals to form. These crystals create speckles, flecking, and larger flakes depending on the mineral and temperature at which the granite forms. Granite is very dense and tough, making it an excellent stone for everyday use.