For this dress style, I recommend an equally elegant necklace. I had a lovely Y-shaped sterling necklace with Swarovski crystal dangles in jet. The necklace is simple yet beautiful enough to work perfectly with this dress! The little crystal dangles give the necklace a dainty feel, with the large crystal drop balancing the design. Unfortunately this necklace is sold, but if you'd like one made similar, just let me know and I'll hook you up!
For another interesting blog post on black and white outfits, check out Kiss Me, Stace (click here for direct link).