Following Kynance Cove, a better quality and more easily accessible site for Soaprock, was discovered to the north at Gew Graze ("Soapy Cove") in 1748. In 1751 the cliffs of Pentreath Beach, south of Kynance Cove, just north of Caerthillian were identified and they began to be worked. Many of the old quarry sites are still visible. The Mullion Cliff site, which was regarded as the most difficult site to work due to the fragmentation of the serpentine here, was quickly followed by other coastal and inland sites. These included Penruddock Quarry, SE of the Vro Rock and the largest of all the soaprock quarries, that of Daroose, situated SE of the Vro. This latter site, extending inland from Teneriffe Farm covering many acres of Predannack Downs was monopolised by the Worcester factory from 1760 when it was leased.