Porcelain

Porcelain is a vitrified pottery with a white, fine-grained body that is usually translucent, as distinguished from earthenware, which is porous, opaque, and coarser. The distinction between porcelain and stoneware, the other class of vitrified pottery material, is less clear. In China, porcelain is defined as pottery that is resonant when struck. In the West, it is a material that is translucent when held to the light. Neither definition is totally satisfactory: some heavily potted porcelains are opaque, while some thinly potted stonewares are somewhat translucent. The word porcelain is derived from porcellana, used by Marco Polo to describe the pottery he saw in China. Reference: Encyclopaedia Britannica