History Place Of Origin: United Kingdom. Date Period: Early to mid 20th century - hallmarked at later date. The stones Ruby weight: 0.25ct Ruby size: Length 4.3mm; Width 4.3mm; Depth 1.7mm Total diamond weight: 0.30ct Band Metal Composition: 18ct yellow gold & platinum. Hallmarks: marked with hallmarks that trace the ring to London, 1982 and indicate 18ct yellow gold. Further marked with 'SJ' makers mark potentially for Sarah Jones, who was an active jeweller in London between 1972 and 1995. The ring overall Front Head Dimensions: Length 5mm; Width 13.5mm; Height of setting 4.8mm General Wear: Excellent; wear commensurate with age. Condition: All stones secure, safely set with claws fully covering each stone, no damage to the setting. Minor scratches due to age. There are no major marks or scratches that we feel necessary to mention. All of our jewellery is professionally cleaned prior to us listing it. Unless stated otherwise, gem weights and specifications are estimated (assessed in mount).