Sterling Silver Blue John Four Stone Chain Cufflinks. CL006. These sterling silver cufflinks feature four hand carved and highly polished Blue John cabochons which have been sourced directly from Castleton, Derbyshire. Finished with flexible sterling silver chains. All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform natural Blue John into these stunning pieces of jewellery. You can find other matching Blue John jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.  Dimensions: 14mm x 10mm, full length: 23mm.