A remarkable 200g specimen of Blue John, sourced from the famous Treak Cliff Cavern in Derbyshire, England. This natural stone showcases the distinctive bands of deep purple, violet, and cream that make Blue John so unique and highly prized. Perfect for collectors, lapidary artists, or as a striking display piece, this specimen highlights the natural beauty and rarity of one of the UK’s most treasured minerals. A true gem of geological and aesthetic significance.