18ct yellow gold whitby jet 004ct diamond marquise ring r399 this elegant ring featuresa stunning marquiseshaped whitby jet stone that has been sourced directly from the north east coast of yorkshire the stone is set within exquisite 18ct yellow gold and it nestles between pave set sparklingdiamonds totalling 004 carats all our whitby jet jewellery is designed and crafted within our very own workshops in derbyshire where a team of skilled craftsmen turn the raw jet into these stunning pi