Large Australian semi black opal pendant, 18ct yellow gold stamped 750 and set with an oval cabochon opal 29.0 x 23.0 mm with strong blues, greens some pinkish red colours also set with 39 Hg\ SI1 round brilliant cut diamonds totalling 0.40ct in combined weight. Pendant fitted with a 44 cm, long 18ct yellow gold snake chain total weight 19.8 grams