If you can not find an embellished dress that you like, just wear a statement necklace with a simple black sheath dress like this $ 13 dress from Target. (lauralily.com)
In 1961, Hepburn wore a Hubert de Givenchy black sheath dress in the film Breakfast at Tiffany's. (en.wikipedia.org)
It's really just a plain black sheath dress that should go with lots of items but because it billowed out below my bust, it looked like a tent. (whenthegirlsrule.com)