I am new here. But i did just read some of the posts. I have read much info on their website, and as far as i know, they are not CZs. To that end, i own a 4 carat cushion cut Lannyte set in rose gold by a great jeweler in Scottsdale AZ. It is absolutely gorgeous. I know (from dating a diamond cutter) that when you look under a loupe that CZ had tiny blue dots at each edge. I have seen them myself. Anyway i will post o picture of my beautiful ring.