Image 1 of 5 Image 2 of 5 Image 3 of 5 Image 4 of 5 Image 5 of 5 A 9ct gold opal ring (pre-loved) £275.00 A 9ct gold seven stone opal ring hallmarked for 1975.Finger size J.Overall weight 2.5 grams. Add To Cart Added! A 9ct gold seven stone opal ring hallmarked for 1975.Finger size J.Overall weight 2.5 grams.