Silver Whitby Jet Triangle Prism Pendant Necklace. P2711. This contemporary pendant features eight triangular hand carved finest Whitby Jet stones, sourced directly from the north east coast of Yorkshire. The stones are expertly set into a solid Sterling Silver geometric prism, creating a thoroughly modern design fit for any occasion. The pendant is presented on an 18 inch long 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 Triangle Prism Pendant Necklace. Pendant 24x12mm including bale.