MARLA AARON The String Project 18-karat white gold, 14-karat yellow gold, cord and diamond necklace

Marla Aaron's 'The String Project' necklace has a 32-inch braided cord that's made from Dyneema - 15 times stronger than steel, but light enough to float in water, it's considered the world's strongest fiber. It's threaded with two different 18-karat white gold locks, both dusted with shimmering diamonds, and has 14-karat yellow gold clasps that allow you to add even more pendants of your own.