Centering one oval cabochon fire opal, measuring 20.50 x 14.20 x 7.30 mm, weighing approximately 10.00 carats, the opal has crazing, set with yellow gold prongs, surrounded by 22 round brilliant cut diamonds, weighing a total of 2.00 carats, VS clarity, H to I color, all set with white gold prongs and both set in a wire basket mounting, with a bottom yellow rim, weighing 7.80 grams, with an 18k white gold oval link style chain, 18 inches in length, weighing 4.90 grams, preowned.