This spoon is covered with a green glaze called celadon. For over 1,000 years, Chinese potters have been using this glaze. They create the glaze from iron and titanium oxides, place it on the ceramics, and then heat the ceramics in ovens up to 2,400 degrees Fahrenheit. Archaeologists have found 455 celadon artifacts in the Market Street Chinatown. These celadon dishes are not of the highest quality. It seems that Chinatown residents were using affordable everyday versions of an expensive refined product. For more information, visit http://www.chinesemuseum.historysanjose.org/digital-exhibits/chinatownhere/object-gallery/celadon-chinese-spoon/.