Sterling silver whitby jet marcasite leaf necklace p929 this contemporary pendant pairs hand polished whitby jet with exquisite marcasite stones to create a spectacular leaf design set into sterling silver and hanging from an 18 inch sterling silver chain the necklace completes any outfit 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 stylish piec