The oldest pottery vessels discovered in East Asia date back to 20,000 years ago within the Xianrendong Cave of Jiangxi province. These fragments emerged from a time when mobile foragers hunted and gathered food during the Late Glacial Maximum. The vessels were simple utilitarian objects yet bore scorch marks suggesting they were used for cooking. Pottery figurines found at Dolní Věstonice in modern-day Czech Republic date from some time between 29,000 and 25,000 BCE. This Venus of Dolní Věstonice statuette was made by moulding and firing a mixture of clay and powdered bone. Independent invention of ceramic art occurred across Sub-Saharan Africa with findings dating to at least 9,400 BC from central Mali. Archaeologists uncovered pieces of the oldest African pottery in the large mountain massifs of the Central Sahara and the Nile Valley. The Nok culture of northern Nigeria produced early high-quality figural work that can be dated as early as 500 BCE and as late as 200 CE. These coil-built figures typically depict heads with triangular eyes and varied facial expressions.
Materials And Technical Classifications
Earthenware is pottery that has not been fired to vitrification and remains permeable to water. Many types of pottery have been made from it from the earliest times until the 18th century when it was the most common type outside the far East. Terracotta serves as a type of earthenware where the fired body is porous yet unglazed or glazed. Stoneware is a vitreous or semi-vitreous ceramic made primarily from stoneware clay or non-refractory fire clay. It is fired at high temperatures and becomes nonporous whether vitrified or not. A European industry standard states that stoneware differs from porcelain because it is more opaque and normally only partially vitrified. Porcelain is a ceramic material made by heating materials generally including kaolin in a kiln to specific temperatures. The toughness strength and translucence of porcelain arise mainly from vitrification and the formation of the mineral mullite within the body. Bone china is a type of soft-paste porcelain composed of bone ash feldspathic material and kaolin. It contains a minimum of 30% phosphate derived from animal bone and calculated calcium phosphate. This material allows for thinner cross-sections than other types of porcelain due to its very high mechanical strength.