14K GOLD, DIAMOND, AND OPAL NECKLACE: This stunning 14K yellow gold necklace contains one 25.00 x 12.50 mm freeform boulder opal. Blue/Green and Red/Orange play-of-color. Accented with 14 round brilliant cut diamonds weighing approx. .75 Ct. Rated VS in clarity and G-H in color. The opal is prong set. The diamonds are channel set. Weight: 17.9 grams. Length: 16.5''.