18ct Yellow Gold Whitby Jet Diamond Marquise Ring. R399. This elegant ring features a stunning marquise shaped Whitby Jet stone, sourced directly from the north east coast of Yorkshire. The stone is set within an exquisite 18ct yellow gold frame between two dazzling 0.04 carats of brilliant cut diamonds.  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 earrings on our website. All articles are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: Whitby Jet: 8x6mm, Band Width: 2mm.