Stainless Steel Silvertone Heartbeat Charm Necklace See the sound of your heartbeat around your neck with Silvertone Heartbeat Charm Necklace. The stainless steel, silvertone design. Features a heart rate pendant and heart alongside the 18 inch chain. This charming necklace is romantic and playful at the same time making it perfect to add to casual outfits! Weights 3 grams.