The small round vanity sink made of natural blue limestone. This vessel sink may be small, but it makes a big statement—its modern design and thin walls make it look bold without being overwhelming. This small vanity stone sink is perfect for bathrooms and powder rooms where space is limited but design ideas are rich. The black limestone construction makes this simply gorgeous and gently sloping vanity durable and versatile, and can be easily installed as a bathroom sink vanity or unique outdoor fixture.