Porcelain Porcelain Porcelain () is a ceramic material made by heating materials, generally including kaolin, in a kiln to temperatures between . The toughness, strength, and translucence of porcelain, relative to other types of pottery, arises mainly from vitrification and the formation of the mineral mullite within the body at these high temperatures. Though definitions vary, porcelain can be divided into three main categories: hard-paste, soft-paste and bone china. The category that an object belongs to depends on the composition of the paste used to make the body of the porcelain object and the firing conditions. Porcelain slowly evolved in China
Porcelain crab are "Petrolisthes quadratus", found in large numbers under rocks in the intertidal, and the red-and-white polka-dotted "Porcellana sayana", which lives commensally within the shells inhabited by large hermit crabs. In Hong Kong, "Petrolisthes japonicus" is common. , some 4723 extant species porcelain crab had been described, divided among these 30 genera: The fossil record of porcelain crabs includes species of "Pachycheles", "Pisidia", "Polyonyx", "Porcellana", and a further 6 genera known only from fossils: The earliest porcelain crab fossil is "Jurellana" from the Tithonian of central Europe. Porcelain crab Porcelain crabs are decapod crustaceans in the widespread family Porcellanidae, which superficially