Marc Jacobs Heart Pendant Necklace in Metallic Gold. Marc Jacobs Heart Pendant Necklace in Metallic Gold. Gold plated sterling silver necklace. Colored crystal accent. Clasp closure. Measures approx 17 in length. MARJ-WL129. M0012245. For the last 30 years, the Marc Jacobs brand has unapologetically pushed and shaped the boundaries of American fashion. This innovation is driven by Marc Jacobs himself, who continues to be an outspoken force to be reckoned with. In his dream world, we are all the stars of our own movie - and his namesake label provides the tools to define individuality and personality.