9ct rose gold whitby jet toscana marquise twist ringr512 this unique and stylish ring is part of the toscana collection designed and made by c w sellors the ring features marquise shaped whitby jet framed within a 9ct rose gold setting with a twist design there are matching items within the collection 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 pieces of jewellery y