Necklaces with a little length prime this retro style for a modern-day comeback. "Consider strands of translucent crystals or quartz that drape over the neckline and allow skin and fabric to peek through," says Khan. "Don't be afraid to layer several pieces." As for your earrings, choose a slight drop in a similar stone.
Andrea Fohrman "Georgia" rock-crystal earrings (saksfifthavenue.com); Allia "Fancy Chain" quartz necklace, doubled up, and "Fancy Stone" quartz necklace (brokenenglishjewelry.com); and Fancy New York "Madeleine" gown (dressmefancy.com).