Silver Whitby Jet Three Point Cross Marcasite Necklace. P2115. This sophisticated necklace boasts a stunning round cabochon of Whitby Jet stone that has been sourced directly from the North East coast of Yorkshire. The stone is set in the centre of this enchanting sterling silver cross which has been embellished with glistening marcasite for an eye catching finish. The pendant sits on a fluid 18inch long sterling silver chain and is completed by a classic lobster clasp. 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 other Whitby Jet necklaces on our website. Silver Whitby Jet Three Point Cross Marcasite Necklace. Pendant 45x24mm.