Silver whitby jet marcasite butterfly brooch m325 this stunning butterfly brooch is handmade in sterling silver andfeatures four beautifully hand carved whitby jet gemstones sourced directly from the north east coast of yorkshire which are surrounded in a silver frameaccentedwith sparkling marcasite gemstones it is an exquisite and detailed piece which would make a beautiful gift all our whitby jet jewellery is designed and crafted within our very own workshops in derbyshire where a t