Silver Whitby Jet Triangular Prism Hook Earrings. E2014. These unique and very eye catching earrings feature hand carved Whitby Jet gemstones inlaid inside solid Sterling Silver triangular frames that combine to produce a modern and striking prism design. The hook style ensures that you will feel secure whilst wearing this pair of earrings. 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 earrings on our website. Silver Whitby Jet Triangular Prism Hook Earrings. 16mm x 11mm.