Jamie Oliver"s Mortar and Pestle are made of beautiful, durable and long lasting granite. The mortar has an attractive granite outer and an unpolished interior for the ultimate grinding experience. The pestle end is also unpolished to aid in grinding and is designed for comfort. Mortar has a large 6-inch diameter and is ideal for crushing and grinding herbs and making dressings. Hand wash recommended. Designed by DKB household and Jamie Oliver. DKB household is known for innovation and quality and Jamie Oliver is one of the world"s best-loved chefs.