Platinum Whitby Jet 0.27 Carat Diamond Stargazer Necklace. P1693C. This elegant pendant from our Stargazer collection, features a stunning, highly polished piece of the finest Whitby Jet stone that has been sourced directly from the north east coast of Yorkshire. The stone is held in place by exquisite 0.27 carat Diamond encrusted Platinum cage. The pendant is suspended from a fine, fluid 16'' Platinum chain. 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 rings on our website. Platinum Whitby Jet 0.27 Carat Diamond Stargazer Necklace. Pendant 5.5cm x 1.5cm. Diamonds: 0.27ct.