Silver Whitby Jet Heart in Heart Pendant Necklace. P3007. This feminine 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 highly polished stone is set within solid sterling silver double heart frame pendant. 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 Heart in Heart Pendant Necklace. Whitby Jet stone 8x10mm.