First of all, welcome to PW! Second of all, what a gorgeous dress! Third of all, let me answer your question.
I think how sparkley the headband and earrings will determine what kind of necklace you need. I do think that you need a necklace with your dress since it's a sweetheart neckline with no straps or sleeves. I think a crystal and pearl
illusion necklace will be positively gorgeous with it, so you should be fine.
My bridal look included a headband, necklace, and earrings with ivory pearls and Swarovski crystal beads and a dress with a square neckline. I purposefully chose my headband to coordinate with my necklace, and I think it turned out quite
pretty. In order to even out the look, I chose simple earrings that went with the other two pieces without creating an overwhelming look, so keep that in mind as you're making your decision.
