750 Yellow Gold (18 kt) Heart pendant  height 3.5 cm (1.37 inches) Lobster claw clasp Length 45 cm (17.71 inches) adjustable to 43 cm (16.92 inches) and 41 cm (16.14 inches) Hypoallergenic and nickel-free materials Made in Italy Each step of Prada&#39;s responsible gold and diamond production chain is verified and traceable thanks to Aura Blockchain technology.