Above is J. Crew's $98 Libretto necklace.
I'm loving this Marie Antoinette-meets-Betty Draper rhinestone necklace, called the Crystal Symphony, also $98.
I love this Old and New necklace from Anthropologie. It's $218 for what, frankly, is an easily replicated design, but I love the way it looks like all of grandma's pearls tangled together.
This tulle camellia necklace, called the Bonheur is $58 at Anthropologie. I think it would look amazing with a very simple, strapless column or A-line dress.
And I saved my favorite for last! The Ranuncula necklace costs a very affordable $42 and is like a bouquet for your neck! Again, probably better with a simpler neckline; I'm very tempted to get it to dress up a rehearsal or exit dress.