Made of solid marble, patterning on each piece will vary. Grind herbs, spices, grains or pills in our beautiful black marble mortar and pestle. Modern designed mortar has a slightly angled front-to-back height 2-inches to 2.25-inches by 4.5-inches in diameter, with a 6-ounce capacity. There is no better technique for releasing the aromatic flavors of fresh herbs and spices than by grinding them. Hand washing recommended.