History of Northwich History of Northwich The history of Northwich can be traced back to the Roman period. The area around Northwich has been exploited for its salt pans since this time. The town has been severely affected by salt mining with subsidence historically being a large issue. A programme of mine stabilisation has recently been undertaken. Northwich is a wich town in Cheshire, England. It lies in the heart of the Cheshire Plain, at the confluence of the River Weaver and the River Dane. The town is approximately east of Chester and south of Warrington. The first references to Northwich are during
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'.