My father use to tell me over and over again that nature abhors a vacuum to his profound enjoyment. Well I think that nature abhors a tourmaline without color. So I always question if an Achroite has been heated or not. Some of what I have cut, such as the centers out of watermelon style crystals that I couldn’t keep their rinds on and the ends of bicolors that didn’t stay together, both from Afghanistan and others are colorless and have not been heated, so I know that natural Achroite exists. And since I can not tell if the posted stone has been heated or not, I keep it as an example of what a nice sized standard round brilliant would look like in colorless tourmaline heated or not. It definitely has a gray overtone, is eye clean and bright. It weighs 2.88 carats.