I really like the light source right over top of her, and I think you did a nice job of capturing that with the shadows cast over her headpiece and face.
You really did some amazing work on that headpiece, too. I have little doubt that you did, in fact, study some gold. I've seen too many artist try to give it a flawless shine. Gold is a very soft metal, which scratches very easily, so it basically never has a perfect shine to it. Bravo to you for capturing that! I also love the ear-pieces, with the carvings along the perimeter.
This lady commands respect, and arrests the attention of onlookers. It's easy to believe that she is a Majesty.