Marble is a metamorphic rock resulting from the metamorphism of limestone formed under immense heat and pressure. The mainly calcite composition is recognised by its characteristic swirls and veins deriving from various mineral impurities originally present as grains or layers in the limestone. Of mid-range hardness (approx. MOHS 3–4), marble is ideally suited for bathroom tops, walls and flooring. Marbles uniqueness makes it desirable for kitchen tops, but care and maintenance needs to be a consideration when choosing this stone.