The Natural Pebble Pattern Glass Circular Vessel Bathroom Sink features an image of a mixture of multi-colored pebbles embedded in the glass. The pebbles are a mixture of gray, browns, blacks, beige and other colors just like you would find on the bottom of a clear river. Each sink is made of high-quality tempered glass. They recommend that you also purchase a mounting ring and drain with your glass sink in the same finish of your faucet.