Jennifer Meyer Maguire's nature-inspired jewelry—gold leaf necklaces, hammered gold diamond-studded bracelets—is elegantly understated, much like the 32-year-old L.A. native herself. So we asked Meyer Maguire what informs her relaxed-chic aesthetic and she divulged some good secrets, like the best vintage jewelry source in L.A. and how exactly she gets first dibs on Stella McCartney must-haves.