I have an AGS Ideal 0 diamond - H&A, scoring a .9 on the HCA - its .46 ct. The issue is my future M-i-L knows about the ring, so she is bragging about her $3000 1 ct diamond which is supposedly flawless and best of the best. Which I suppose it could be, but the issue is I think I bought an awesome diamond, and m-i-l will downplay. However, I think a good demonstration of the quality is its brilliance/fire/sparkle. I notice when I look at the diamond, every/most facets reflect a rainbow color, which I'm guessing is a sign of good fire. Does anyone have any good suggestions that I can use to prove to m-i-l that it is a good diamond? I have the cert but that means nothing to her - and not that I'm trying to please m-i-l - but so far everything I ever own or buy is in her mind "not as good as I think it is"