With nature as both guide and inspiration, Novatto searches worldwide to select the finest quality natural black granite for our master stone artisans to handcraft into these stunning vessel basins. Each 17-inch round vessel is beautifully unique with a smooth polished interior and a rough textured exterior crafted by Mother Nature herself. Slight variations in color and texture are to be expected. These sinks are constructed for above-counter installation with standard U.S. plumbing connections. For best cleaning results, a stone sealant should be used to protect the surface. Novatto sinks add art and function to any bath or powder room.