Jasperware is a distinctive, unglazed stoneware developed by Josiah Wedgwood in the 1770s, famous for its matte "biscuit" finish, often featuring white, raised neoclassical reliefs against a colored background, most famously the pale blue known as "Wedgwood Blue," though it comes in other colors like black, green, and lilac, mimicking ancient cameos. It's a highly durable ceramic, stained throughout its body with metallic oxides, making it a prized collectible.