Lady's Platinum 5.50 Carat Emerald & 1.60 cttw Diamond Cocktail Ring. Ring Size: 8 (Can be Resized to Fit Most Any Finger) Contains: One Natural Emerald Cut Emerald. Weight Approx: 5.50ct, Color: Green, Origin: Columbia. Six Long Straight Baguette Cut Diamonds. Weight Approx: 1.60cttw, Color: F-G, Clarity: VS1-VS2. This is an emerald of colossal size, color, and clarity, mounted in the noble metal, platinum. Most emeralds today that are being shipped out of the mines are of the dark maudlin colors. Not only is this emerald a most exquisite color but it a most important size. 5 carat emeralds are rare, rare, rare. It takes more than 10 carats of rough to obtain a stone of this size.