Silver Whitby Jet Marcasite Flower Ring. R815. This feminine floral Sterling Silver, Whitby Jet and Marcasite ring features a circular central piece of Whitby Jet that has been sourced directly from the north east coast of Yorkshire. The striking stone is surrounded by intricate petals with tiny pieces of Marcasite at their hearts. 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. Silver Whitby Jet Marcasite Flower Ring