Potter's medium is a type of material used in pottery and ceramics. It is typically made from CLAY, which is a natural material composed of minerals and organic matter. CLAY is often mixed with other materials such as sand, grog, and feldspar to create a more durable and malleable material for use in pottery and ceramics. Potter's medium is an important part of the pottery-making process, as it allows the artist to shape and form the CLAY into desired shapes and forms.