A blue or purple banded variety of fluorite found in Derbyshire.
Example sentencesExamples
- It is likely that they were searching for deposits of lead ore and struck upon an outcrop of Blue John by chance.
- And please note: because of the nature of Blue John we cannot guarantee that the patterning in the stone you receive will be exactly the same as that shown in the photograph above.
- Many of our Blue John items can also be made in other stones like Jade, Turquoise or Mother of Pearl.
- The name Blue John very likely was made up by John Kirk and Joseph Hall who worked the mines in the 18th Century.
- It looks like at some point the slag from the mine was dumped into this hole in small quantities, and as a boy I found many chunks of Blue John down there.