Sterling Silver Whitby Jet Marcasite Double Row Stone Necklace. P2133. This stylish necklace features a highly polished marquise shaped cabochon of fine Whitby Jet stone that has been sourced directly from the north east coast of Yorkshire. The stone has been placed within a vintage sterling silver setting embellished by two layers of marcasite stones, giving an elegant and sparkly finish to the piece. The pendant hangs gracefully from a fluid 18 inch long sterling silver chain completed by a classic bolt ring clasp for easy wear. 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. You can find other matching Whitby Jet jewellery and other Whitby Jet necklaces on our website. Dimensions: 31mm x 15mm plus a 5mm bale, Whitby Jet: 16mm x 5mm.