Natural Fancy Green Diamonds
Natural fancy green diamonds are completely natural and are caused by exposure to atomic radiation. After natural fancy red diamonds, natural green diamonds are the second rarest.
A heart-shaped Fancy Green Diamond
"The approximately 41 carat Dresden Green diamond is the largest, and perhaps the finest, green diamond known to have a colour of natural origin," (source: Kane, 1990).
"In the diamond industry, green diamonds are highly valued and greatly admired, especially pure green coloured diamonds that show no trace of secondary colour modifiers," (source: S.C. Hofer. 1988).
The seven natural color grades for natural fancy colored diamonds are, in ascending order, Faint, Very Light, Light, Fancy, Fancy Intense, Fancy Vivid and Fancy Deep. Fancy Vivid and Fancy Deep the most desired hues.
Natural fancy green diamonds come in all cuts and shapes, including Princess, Emerald, Asscher, Oval, Marquise, Pear, Radiant, Heart and Cushion, though Round natural fancy green diamonds are the most common.