Definition of Blue John in English:

Share this entry

Blue John


[mass noun]
A blue or purple banded variety of fluorite found in Derbyshire.
Example sentences
  • Many of our Blue John items can also be made in other stones like Jade, Turquoise or Mother of Pearl.
  • It is likely that they were searching for deposits of lead ore and struck upon an outcrop of Blue John by chance.
  • The name Blue John very likely was made up by John Kirk and Joseph Hall who worked the mines in the 18th Century.
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.