5 Places to Buy Ceramic and Pottery Materials in New York
Most stores sell online so you have to plan ahead. If you are on a hurry maybe you can be lucky and find what you are looking for at a Blick Store or Artists and Craftsman Supply. Both of them carry a small selection of pottery and ceramic materials like glazes, underglaze pencil, tools, and low firing clays.
My favorite online store is Ceramic Supply. They deliver every week if you order over $250 USD. They have a great catalog of clays. You can also order online. http://ceramicsupplyinc.com/