继“ＧＥ ＰＯＬ”用高压高温方法将茶色金刚石改成无色之后，同样用此方法将茶色或浅黄色、无色金刚石改成鲜艳的黄绿色或绿黄色。它们没有明显的鉴别特征，无法判别其是天然致色还是人工处理改色。 Following the “GE POL” using high pressure and high temperature method to change the brown diamond colorless, the same way this method will be brown or light yellow, colorless diamond into a bright yellow-green or green-yellow. They have no obvious distinguishing features and can not tell if they are natural or artificial.