Nantwich Cheshire Plain around the town. "Nant" comes from the Welsh for brook or stream. "Wich" and "wych" are names used to denote brine springs or wells. In 1194 there is a reference to the town as being called "Nametwihc", which would indicate it was once the site of a pre-Roman Celtic nemeton or sacred grove. In the Domesday Book, Nantwich is recorded as having eight salt houses. It had a castle and was the capital of a barony of the earls of Chester, and of one of the seven hundreds of medieval Cheshire. Nantwich is one of the few places
Blue John (mineral) Blue John (mineral) Blue John (also known as Derbyshire Spar) is a semi-precious mineral, a form of fluorite with bands of a purple-blue or yellowish colour. In the UK it is found only at Blue John Cavern and Treak Cliff Cavern at Castleton in Derbyshire. During the 19th century, it was mined for its ornamental value, and mining continues on a small scale. Deposits of fluorite have been recently found in China with colouring and banding similar to the classic Blue John stone. The most common explanation for the name is that it derives from the French "bleu-jaune", meaning 'blue-yellow'.