A 9ct gold opal necklace, 2 row necklace collet set with 65 round and oval solid crystal and doublet opals, sizes 5 - 6 mm round and 6 x 5 - 14 x 12 mm oval, some cracked, chipped and crazed, on cable chain with toggle clasp, length 51 cm, wt. 50.56g.