Monday, August 28, 2006

Inside Treak Cliff Cavern




We visited Treak Cliff Cavern, a mine in the only hill in which Blue John stone is mined. Blue John is a semi-precious mineral with blue and yellow striations. it is reputedly named after the French translation 'bleu jaune', though it has been mined since Roman times. Two vases made of it were found in Pompeii. These pictures don't feature any of the sought-after mineral, just some mineral formations deep inside the caves. Posted by Picasa

Comments:
Is Blue John also found in southern Italy? Or perhaps it was part of trade goods?
 
No, Blue John is only found in this one hill. It is still mined there, but in very small quantities.
 
Good stalactites! I think Blue John glows slightly in the dark - but I might be wrong about that. I'd no idea it was found in Pompei - that's impressive.
 
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