Pottery made of clays of different colours; as the clays spin on the potter’s wheel, striations similar to those in natural agate are formed. A similar effect is sometimes achieved with surface slips. Agate ware was made in Classical Rome, and was revived in 18th-century Staffordshire, notably in the Wedgwood and Whieldon factories. In the late 20th century the American potter Michelle Erickson (...
