WebUndoubtedly, there may be other solutions for Purple-blue fibrous variety of fluorspar occurring only in Derbyshire. If you discover one of these, please send it to us, and we'll … WebAfter being mined at Milldam, the ore is transported to BFL's Cavendish Mill at Stoney Middleton, the UK's only facility for producing acid grade fluorspar for the chemical …

Treak Cliff Cavern - Wikipedia

WebDec 19, 2024 · The United States has a few identified resources of fluorspar, most notably the Klondike II property in the Illinois- Kentucky fluorspar district located about 8 kilometers southwest of Salem, Kentucky, which has a large vein that contains at least 1.6 million metric tons at a grade of 60 percent CaF 2 (Feytis, 2009). WebSummary. The paper presents an account of the mineralogy, geological occurrence and history of the blue and white banded fluorspar found near Castleton in Derbyshire. Blue John is shown to be a fluorspar, coloured by bituminous inclusions, deposited as cavity-linings and replacements in Carboniferous Limestone of reef and massif facies. the market at river fa potomac

Fluorite - Wikipedia

Blue John (also known as Derbyshire Spar) is a semi-precious mineral, a rare 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 … See more The most common explanation for the name is that it derives from the French bleu-jaune, meaning 'blue-yellow'. The story goes that Blue John was exported to France where it was used by ormolu workers during the … See more It is sometimes said that Blue John of Derbyshire was discovered by the Romans. However, the earliest source of this story is William … See more By the 19th century Blue John was being fashioned into a wide variety of ornamental items ranging from knife-handles to chalices. The precise quantities mined in any given … See more • Media related to Derbyshire Blue John at Wikimedia Commons See more In the United Kingdom, the blue, banded fluorite known as Blue John is found only under the triangular hill known as Treak Cliff, just outside the town of Castleton. Today the veins are mined only in Blue John Cavern and the nearby Treak Cliff Cavern, … See more Before they can be worked, the stones (having been air-dried for at least a year) are heated in an oven, then placed in a bowl of hot See more "The Terror of Blue John Gap" is a short story by Sir Arthur Conan Doyle, which appeared in The Strand Magazine of 1910 and describes the experiences of a doctor who, while … See more Webfound: Dict. of mining, mineral, and related terms, 1968 (Fluorite, fluorspar, florspar; murra, murrha: the Latin term for a material first brought to Rome by Pompey & used for costly … WebOf the many varieties of fluorspar found in the Peak District of Derbyshire, by far the best known is Blue John, long used for the manufacture of a variety of ornaments and jewellery. Blue John fluorspar - FORD - 1994 - Geology Today - Wiley Online Library tiered porcelain platter set