Sterling Silver Blue John Crescent Cufflinks CL538 These classic cufflinks feature stunning oval shaped cabochons of the finest Blue John and durable swivel T bar fastenings. Handcrafted in sterling silver and inspired by the key design of the crescent facade and the oval shape of the pool within the Pump Room, C W Sellors\' Buxton Crescent jewellery collection is set with a choice of white Carrara marble - representing the interior of the Pump Room - and the finest cut Derbyshire Blue John gemstone. 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: silver frame 21mm x 14mm, stone 18mm x 7mm.