18ct yellow gold whitby jet 012ct diamond round cluster ring r600 hand cut set and polished in our own workshop this unique whitby jet and diamond round cluster ring is set within 18ct yellow goldusing only the finest quality diamonds total weight for the diamond is 012ct a perfect engagement ring that features a rare british gemstone or a fabulous and indulgent gift all our whitby jet jewellery is designed and crafted within our very own workshops in derbyshire where a team of ski