The 856 white onyx vessel sink is made from natural onyx. The sink is carved from a large block of onyx, a type of marble, and hand-polished for a smooth, easy-to-clean finish. This sink has an all-over pale yellow color with light tan veins running through it and clusters of reddish-brown scattered throughout. Since onyx is a natural stone, the details will vary in color and pattern from sink to sink. A matching stone waterfall faucet is available to correspond with this sink. The overall dimensions for the 856 are 16" x 16" x 5" and an 18" minimum cabinet size is required. As always, our stone sinks are covered under a limited lifetime warranty for as long as you own the sink.