Antiques – Blue John, Eye Candy to Antique Collectors

Blue John Stone is found nowhere in the world but amongst the rocks of Treak Cliff Hill, Castleton and exists in only two caverns: Treak Cliff Cavern and Blue John Cavern. This mineral, a colour banded form of fluorspar, has been prized for many hundreds of years. Vases found amongst the ruins of Pompeii are [...]