Blue John Shrovetide Engraved Limited Edition Cufflinks. CL467. Celebrate the local game with these Shrovetide Limited Edition cufflinks that boast stunning round pieces of cabochon Blue John that have been directly sourced from Treak Cliff Cavern in Castleton. The stone is set within sterling silver settings that have been engraved with Shrovetide Football Ashbourne around the edge so you can show off your support for the Ashbourne tradition. All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen turn the raw Blue John stone into these sophisticated pieces of jewellery. You can find other matching Blue John jewellery and other Blue John cufflinks on our website. All articles purchased from this collection are lovingly and securely dispatched with our unique Shrovetide gift box. Sterling Silver and Blue John.