Silver Whitby Jet Marcasite Fancy Wheel Necklace. N993. This stunning statement piece features a large round shaped hand carved Whitby Jet gemstone set at the heart of a fancy Sterling Silver wheel shaped frame accented by sparkling Marcasite gemstones. A very eye catching necklace with a vintage feel, this piece uses on the finest locally sourced Whitby Jet. This item also features a 16" silver foxtail chain. 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 Fancy Wheel Necklace. Large Whitby Jet stone 23mm x 23mm.