Necklace: Rebel Pendant Necklace by Stella & Dot (Thanks Christie!)
Margaux Lemarchal (played by Karine Vanasse) on Revenge on ABC was spotted wearing this blue strapless dress on Revenge on episode 'Control' (3x05) in Oct 2013. Margaux's Necklace is the Rebel Pendant Necklace by Stella & Dot .