You are viewing a custom made 18K two tone , white and yellow, gold ring made in the 1980's.The ring measures 15 mm or over 1/2" long up the finger by 22 mm or 5/8" across. Set in the center is a natural 4 carat cabochon blue Sapphire. On either side are fancy cut blue Sapphires in a channel. The total weight of all the Sapphires is 5.20 carats. Set on the shoulders in white gold are pave Diamonds weighing 1/2 carat in total. The ring is marked: K18 for 18K. It is a size 7 with a thick shank and can be re-sized. The ring weighs 13 grams.