A fine opal and diamond pendant necklace, set in 18ct gold with an approx. 10ct ovoid cabochon fine semi crystal black opal exhibiting a broad spectrum of colours in block patterns, surrounded by 50 round brilliant cut diamonds totalling approx. 0.50ct, on a 9ct curb chain with parrot clasp, size 43 x 17 mm, length 40 cm, wt. 8.5g.