Sterling silver whitby jet long marquise celtic necklace p1391 this elegant necklace features hand carved whitby jet that has been sourced directly from the north east coast of yorkshire the highly polished whitby jet marquise is framed within a unique sterling silver celtic design with the pendant being presented on a 18 sterling silver chain all our whitby jet jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of skilled craftsmen turn th