This extremely pretty 18ct yellow gold ring is set with a blue oval sapphire of 0.55ct and surrounded by 12 round brilliant cut diamonds. The hallmark - slightly worn - is for Edinburgh 1981. The ring size is K (UK) - 5 1/4 (US). There is also a makers mark: JCB. There are signs of wear to the girdle of the sapphire and slightly on the table. These don't affect the beauty of the ring and do not make it vulnerable within the setting. All 12 diamonds are very good as are all the claws. The sapphire has a tiny tinge of green which can be seen in the photographs.