ASD Jewellers is an independent family business formed in 1977. We are based in Castleton in the heart of the Peak District National Park, Derbyshire, England. This village is home to the only known deposit of the beautiful mineral, Blue John. The stone was mined in Castleton nearly two thousand years ago by the Romans, who recognised it for its beauty. Today, ASD Jewellers produce a range of stunning jewellery, incorporating this enchanting mineral. ASD Jewellers design and produce all jewellery on the premises and now boast the largest collection of Blue John jewellery in the world. Inspiration for the styles stem from a great number of sources resulting in an extensive range which includes both traditional, modern and celtic designs. These original and beautiful pieces can be purchased in many different ways - direct, on the Internet, by fax, by post or by telephone or, alternatively, from our retail outlet in Castleton, which is open seven days a week, all year round.