Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 9ct gold opal and garnet ring ( pre-loved) £160.00 A 9ct gold opal and garnet ring hallmarked for 1979.Finger size M.Overall weight 1.6 grams. Add To Cart Added! A 9ct gold opal and garnet ring hallmarked for 1979.Finger size M.Overall weight 1.6 grams.