Silver Whitby Jet Marcasite Marquise Double Row Bead Ring. R814. This simple and stylish ring boasts a marquise shaped cabochon of Whitby Jet stone that has been sourced directly from the North East coast of Yorkshire. The stone has been placed within an exquisite sterling silver setting encrusted with dazzling marcasite, bringing a sophisticated sparkle to the piece. The ring is completed by four split shoulders and a classic sterling silver band. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen turn the raw Whitby Jet stone into these stunning pieces of jewellery. You can find other matching Whitby Jet jewellery and otherWhitby Jet rings on our website. Silver Whitby Jet Marcasite Marquise Double Row Bead Ring. Whitby Jet stone 16x5mm, ring 31x15mm.