I don't really understand High Key, but this shot looks really good. The only thing I wonder is if a dark background would bring out the cross better...or does that interfere with the High Key?
@henrir High-key lighting is usually quite homogeneous and free from dark shadows. The terminology comes from the key light (main light). Type in high-key in the search bar of google to see a few examples. It is kinda cool in my opinion. Thanks for lookin' in again!