18ct yellow rose gold whitby jet diamond lyria necklacecmt116 this unique marquise shaped whitby jet and diamond drop pendant is set in 18ct rose and yellow gold a subtle 003 carat diamond adds unique detail to the clasp this pendant is a sophisticated and stunning design featuring whitby jet stone which has been sourced directly from the north east coast of yorkshire all our whitby jet jewellery is designed and crafted within our very own workshops in derbyshire where a team of skilled