Sterling Silver Whitby Jet Celtic Knot Pendant Necklace. P1199. This unique necklace features hand-carved Whitby Jet that has been sourced directly from the North East Coast of Yorkshire. The highly polished Whitby Jet gemstone is framed within a sterling silver Celtic design with the pendant being presented on a 18\" sterling silver chain. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform the natural Jet into these stylish pieces of jewellery. You can find other matching Whitby Jet jewellery and other Whitby Jet earrings on our website. Dimensions: 20 x 15mm including the bail.