Dark gray marble mortar and pestle, designed for efficient herb grinding. From Facebook: This amazing mortar & vessel is made of solid natural stone. We've placed rubber felt on the bottom of every mortar and pestle set to prevent the impact of the masher from reaching the kitchen floor and to reduce noise. The wonderful properties of natural stone make each piece unique and special. It's a food preparation method from centuries ago, and is still considered the best way to bring out the true flavor of herbs and spices.