Search results
Results from the WOW.Com Content Network
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 United Kingdom it is found only at Blue John Cavern and Treak Cliff Cavern at Castleton in Derbyshire .
An excavated piece of Blue John. At Treak Cliff and nearby Blue John Cavern, the fluorspar is uniquely banded, ranging from blue-black to white. The exact cause of the coloration is disputed, but it seems that the formation of Blue John requires a rare combination of porous limestone containing a little hydrocarbon, small traces of radioactive ...
Blue John Gap a mine, one of only two in the world where the beautiful and rare Blue John mineral is found. The Romans created the mine and, in the process, their shaft intersected into the great water-worn caves of the underworld.
John Ambrose, a longtime beekeeping professor at NC State and a former president of the NC State Beekeepers Association, conducted an experiment in the 1970s to try to learn the answer.
The Mint began making these half-dollars in 1964 to honor assassinated President John F. Kennedy. Check Out: 8 Rare Coins Worth Millions That Are Highly Coveted by Coin Collectors 1925-S Lincoln Penny
In the UK Blue John, or "Derbyshire Spar", is found only in Blue John Cavern and the nearby Treak Cliff Cavern.It is a type of banded fluorite.The most common explanation for the name is that it derives from the French bleu-jaune, meaning 'blue-yellow', but other derivations have been suggested.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
“Look!” Scott Dudelson exclaims as he points to John Coltrane, Prince, Stevie Wonder, and Lou Reed vinyl albums displayed on the wall of the restaurant where we are having dinner. “If you ...