The eye position is strikingly off, maybe that is your intention but i think its distracting from the overall beauty of the pieces simplicity, love the blue maybe more of that light could be used in her eyes, nice cold stare. Also do the lips need to be without any colour lips often reflect atmosphere in weather and therefore the piece. Lastly I think it needs a renaming its not aquamarine to me though i know a lot of paint companies disagree on colours and no to people see colour the same.

Overall great cold picture for the winter months keep up the good work (y)