This Fire Opal has brilliant colors including red, blue, green & yellow, measuring 27 x 25 x 4.10 mm, weighing approximately 16 carats, set in an 18k yellow gold custom made mounting, decorated by 51 round brilliant-cut diamonds, weighing a total of approximately .75 carat, the removeable bail is decorated by 27 round brilliant-cut diamonds, weighing a total of approximately .25 carat, all diamonds are VS clarity, G to H color, weighing 12.10 grams, the opal is in excellent condition, pre-owned.