An Edwardian black opal and diamond pendant necklace, curved bar and line drop millegrain set with 7 old European cut diamonds totalling an estimated 0.25ct suspending a 14 x 10 mm drop shape solid black opal with fine broad colour range, all set in platinum, gold and silver alloy mix, length 35 mm, on a 9ct white gold chain with bolt ring clasp, length 42 cm, wt. 3.46g.