5.90 ct. Colombian Emerald

Color : White diamonds color range from D (colorless, the purest white) to Z (light color). D, E and F are colorless diamonds, G, H , I and J are near colorless , K and L are faint color, M to Z have a light color.
Emerald : Emerald is a gemstone, a variety of beryl colored in green by trace amounts of chromium, vanadium and sometimes iron. Emerald frequently contain many inclusions, with a result of poor resistance to breakage making their cutting very difficult.
Emerald cut : This square or rectangle cut was developed to address natural weakness of emeralds due to the high quantity of inclusions it contains. It is widely used to cut other gemstones than diamond.