Silver Whitby Jet Marcasite Seventeen Pear Drop Necklace. N1000. This stunning statement piece features a large pear drop shaped hand carved Whitby Jet gemstone as the focal point, with 16 additional pear shaped Whitby Jet gemstones along the length of the necklace. Each stone is framed in Sterling Silver and accented with sparkling Marcasite gemstones for a beautifully ornate and vintage feel. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen turn the raw Whitby Jet stone into these stunning pieces of jewellery. You can find other matching Whitby Jet jewellery and other Whitby Jet necklaces online and instore. Silver Whitby Jet Marcasite Seventeen Pear Drop Necklace. Large Whitby Jet stone 37mm x 23mm, Small Whitby Jet Stones; 12mm x 8mm, necklace length; 18 inches.