The Mia Donna "hybrid" is not a diamond but a fancy cubic zirconia. They sell Asha simulants (CZ) that are expensive as well. They are really beautiful...but Mia Donna is so expensive. Make sure the company you buy from has a lifetime warranty. And, above all, don't worry about what people ask/don't ask. Personally, I don't think many will truly know. It's the low quality yellow-tinged diamonds that get the bad comments, not a simulant that people don't question.