Sterling Silver Whitby Jet Organic Concave Signet Ring. R391. This modern take on the classic signet ring features a hand carved Whitby Jet stone, sourced directly from the North East coast of Yorkshire. The stone takes an ornate heptagon shape, 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 and other Whitby Jet rings on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: 10mm x 10mm. Band Width; 3mm.