Emerald Cut Blue Topaz Cocktail Ring in 14k White Gold.  This cocktail ring features a beautiful 12.54 carat emerald cut blue topaz that is set in 14 karat white gold. The whole look of this ring is extremely unique, as a shape it is a trapezoidal prism with its two bands connecting at four points to the inside of each trapezoid. The topaz makes up the long end of the shape which shows how deliberately this very modern look was built around the lovely stone.