You are viewing a fine quality 18K yellow gold pyramid style ring made in the 1970's. The ring measures 9 mm or 3/8" long up the finger by 19 mm or 3/4" across. Set on top is a fine quality natural calibrated cut blue Sapphire weighing around 1/3 of a carat. On each side of the Sapphire are fine Diamonds (VS1-G) weighing around 0.30 points in total. The ring is marked: 18KP( plumb gold). The ring is a size 6 1/2 with a thick shank and can be re-sized. The ring weighs 7.3 grams.