This is the Swarovski Teddy Bear Beating Heart Necklace, part of the brand's Teddy collection. The main body of the teddy bear is inlaid with clear crystals, and a "beating" crystal is set in the heart-shaped area on its chest. It's one of Swarovski's representative designs that combines cute elements with the classic "beating heart" technique. The necklace's tightness is adjustable.