Sterling Whitby Jet Small Cushion Signet Ring. R191. This classic signet style ring features a hand carved Whitby Jet stone, sourced directly from the North East coast of Yorkshire. The stone is inlaid within a thick band of solid sterling silver. The finished piece is smooth and sleek, and showcases the highly polished stone to great effect. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform the natural Whitby Jet stone into these stunning pieces of jewellery. You can find other matching Whitby Jet jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: Whitby Jet stone 8mm x 10mm.