This weekend we are off to sunny Manchester to visit my mother-in-law. We are taking the Virgin Train up from Euston and heading straight to a place call Blue John Mine. My husband suggested we all take a trip there as he knows my passion for gemstones and minerals. The Blue John Mine is set in the Peak District and is a series of caverns formed in limestone strata. We will get to see the how the Blue John is formed and mined. 
"Blue John is Britains rarest mineral first discovered at Castleton by the Romans almost 2000 years ago. And are the worlds only known deposits of this extremely rare and beautiful stone."
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