Silver Whitby Jet Marcasite Pear Drop Rhombus Link Necklace. N894. This stunning statement piece features a large teardrop shaped hand carved Whitby Jet gemstone set in sterling silver accented by sparkling Marcasite gemstones. A very eye catching necklace with a vintage feel, this piece uses only the finest Whitby Jet gemstone. 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 Pear Drop Rhombus Link Necklace. Drop length 50mm x 20mm Whitby Jet: 23mm x 20mm. Necklace length 18 inches.