VERY well done. I really like how this pic turned out. the cosplay is SO real looking, and your (REALLY blue) eyes, hair, and tiara stand out a lot. I am trying to give a constructive critisism of something you could improve on, but the costume, pose and picture itself, are all pretty much perfect.
I did make it. I made the crown pieces separate out of Sculpey, made a "headband" from wire wrapped in sculpey for the crown pieces to attach to, baked and sanded those pieces, glued them together and painted them. The gem I made a model of from model magic, sanded and sealed it with modge podge. Then I sanded the modge podge and made a mold of it using Amazing Mold Putty, which you can find at Michael's for $20. Then I cast the gem from clear polyester resin, which you can find on Tapplastics.com. Hope that helps. ^ ^