gillorin, thank you for that very informative post! Appreciate it, mate. The seller told me that it does indeed have a slight AR coating. I don't know that I'm familiar enough with AR to tell if it indeed does have it or not. I do know that at certain angles, the crystal does dissapear. However, in most situations, I can easily see reflections in the crystal. So....in answer to your question....I'm not sure . Careful lighting is probably the most accurate answer.
And thanks all for your comments!