18KY MONTANA SAPPHIRE BEZEL TOP RING, TAPERED SHANK. ROUND SAPH, GREENISH, 0.90CT 16 RBC DIAS IN SHANK, 16=0.18CT. 6.8MM RND BEZEL TOP, SHANK IS 3.5X2.55MM AT TOP, 1.54X1.65MM AT BASE. 2.2DWT