Made from one of our most precious stones, Novatto's green onyx vessel will add special character and charm to your bath. Our green onyx vessels come from around the world, giving you a one-of-a-kind bath masterpiece. Natural stone cannot be compared to everyday synthetic porcelain and ceramics. Honed and hand polished to perfection, this round 17-inch vessel is unique in tones of brown and light green. Onyx is also translucent letting light easily pass through it. If you are looking to make a statement, place lights in the counter underneath the sink to give it an ambient glow! Since onyx is from Mother Nature, each sink will vary slightly in color and veining. These sinks are designed for above-counter installation with standard U.S. plumbing connections. For best cleaning results apply the included Glacier Ice sealer. Included with the sink is Novatto's umbrella drain (UPD-ORB), constructed of solid brass for strength and durability. Finished in oil rubbed bronze, the drain assembly has two rubber seals, a plastic spacer, and brass fastener. Novatto strives to provide superior products with exceptional qualities and unique innovations that professionals and homeowners trust. Novatto's customer service is always here to answer any technical product questions or help you select a matching faucet.