9ct Yellow Gold Whitby Jet Square Cushion Cufflinks. CL128. These classic 9ct yellow gold cufflinks feature hand carved cushion shaped cabochons of fine Whitby Jet and durable swivel T bar fastenings. Polished to a high shine, these cufflinks are simple, elegant and timeless. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform natural pieces of Whitby Jet into these stunning pieces of jewellery. You can find other matching Whitby Jet jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.  Dimensions: Whitby Jet: 15mm x 15mm.