Blue John Raw Vein 22g

Copilot said:

Blue John is a rare and beautiful variety of fluorite, prized for its distinctive bands of blue, purple, and yellow. It is found only in the Castleton area of Derbyshire, England, specifically within Blue John Cavern and Treak Cliff Cavern, making it one of the world's most geographically restricted ornamental minerals.

Its rarity comes from this unique location and the limited amount that can be mined. Most major veins were heavily worked during the Georgian and Victorian periods, and extraction today is carried out on a much smaller scale to preserve the remaining deposits. As a result, genuine Blue John is highly sought after by collectors, jewellers, and craftsmen.

Often called "Derbyshire Spar," Blue John has been used for centuries to create decorative vases, jewellery, and ornaments, many of which can be found in stately homes and museum collections throughout Britain.