A 5.67 carat standard brilliant round gemstone, that is bright and flawless.
Achroite is an old trade name for colorless tourmaline (Elbaite). It is from the Greek, like many names, and it is a find name, but one I have had made relatively little use of. Why you might ask. Well to find a truly colorless tourmaline that does not have a hint of color that someone can see is pretty difficult. Now you know that I try and be difficult with tourmaline color and have even been known to be argumentative (in a nice way), but the book is closed on this one. Achroite is the best name for this bright well sized (5.67 carat) standard brilliant round, period. It is the largest gem in the collection that I call Achroite and I don’t think it has been heated. I don’t think that it has been heated because of the source of the material, the condition of the rough (it did not have it surface ground to help prevent cracking) and just a hint of color that I can see in some white lights). I do have a few colorless, actually they have more gray in them than this gemstone, that I purchased from Thailand. I am sure that the Thai material was heated, just because they don’t let go of good rough. I know that you can get colorless from pinks and blues and other colors I suspect. I got the Thai material to see if I could tell that it had been heated,when I cut and polished it. I could not. I don’t have anything heated myself.
Bruce
