Mind that marble naturally has appearance variations, and your basin can deviate in pattern from images and samples in stores. Natural stone can also have so called healed fissures. These are developed during the formation of the stone and can appear as a crevice. These deviations are no reasons for reclaims. Marble is porous and absorbs liquids. The basin is delivered untreated. Seal the surface regularly with a marble sealer to improve its stain resistance. Remove soap residue and limescale daily with a damp cloth and, if needed, a pH-neutral detergent. Do not use any detergents and products containing abrasive agents, acids, ammonia, acetone or other chemicals (such as scouring powder, hairspray, hair dye, bleach, hair removal cream and nail varnish remover, etc.). If any of the above items should get on the product, they should be removed immediately in order to avoid damage. Baking soda mixed with water can be used to remove stains if rinsed with plenty of water afterwards. Do not use steel wool or abrasive sponges. Do not place hot objects (eg. a curling iron) on the surface and avoid any sharp objects that can damage the surface.