Sterling Silver Whitby Jet Square Cushion Cufflinks. CL128. A perfectly symmetrical cushion shaped Whitby Jet stone is set into Sterling Silver and fitted with a durable swivel T bar fastening. The ideal combination of individuality and enduring style encapsulated in a cufflink giving a smart and professional appearance. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Derbyshire where a team of skilled craftsmen transform the natural Jet into these stunning pieces of jewellery. You can find other matching Whitby Jet jewellery and other Whitby Jet earrings on our website. All articles purchased from CW Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Matching items are available within this collection. Dimensions: Cufflink head: 15mm x 15mm, Cufflink profile; 4mm.