Silver Whitby Jet Cushion Pendant Necklace. P3009. This contemporary, stylish pendant is part of our Eclipse collection and features fine Whitby Jet stone that has been sourced directly from the north east coast of Yorkshire. The stone is inlaid within a smooth, solid sterling silver cushion shaped frame, creating a thoroughly modern design fit for any occasion. The pendant is presented on a fluid 18 inch sterling silver chain complete with 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. Silver Whitby Jet Cushion Pendant Necklace. Pendant 23x11mm including bale, Whitby Jet 9x9mm.