18ct Rose Gold Whitby Jet 0.46ct Diamond Round Dress Ring. R732. This beautiful ring features a bold round cabochon piece of Whitby Jet stone set within 18 carat Rose Gold. Pave set diamonds surround the central stone and five diamonds run down the shoulders and two diamonds are set at each claw. 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 rings on our website. 18ct Rose Gold Round Whitby Jet Diamond Dress Ring. Diameter of jet stone 12mm. Diameter of ring including diamonds 16mm.