Gives the look, feel, and texture of natural stone, the Undermount 50/50 Double Bowl Black Onyx Granite Kitchen Sink by Kraus is crafted from 80% natural granite with a tough, nonporous surface that is resistant to heat, chemicals, scratching, chipping, and discoloration that will stand up to a lifetime of use. Find exclusive offers and free shipping on orders over $99 on Kraus Kitchen Sinks when you shop at KitchenSource.com.