Clay
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Clay is a type of fine-grained natural soil material containing clay minerals. Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as
Boulder clay cliff south of Withernsea, England
A 23,500 times magnified electron micrograph of smectite clay
Italian and African-American clay miners in mine shaft, 1910
Clay layers in a construction site in Auckland, New Zealand. Dry clay is normally much more stable than sand in excavations.
Pottery
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Pottery is the process and the products of forming vessels and other objects with clay and other raw materials, which are fired at high temperatures to give them a hard and durable form. The place whe
Clay
…from impurities, such as a reddish or brownish colour from small amounts of iron oxide. Clays develop plasticity when wet but can be hardened through firing. Clay is the longest-known ceramic raw material. Prehistoric humans discovered the useful properties of clay and used it for making pottery. Some of…
Hand building a jar
An 18th-century Chinese export porcelain service, for the America market
The pottery market in Boubon, Niger
Earthenware jar from the Neolithic Majiayao culture China, 3300 to 2000 BCE