The Black Onyx Necklace has an ingenious design and is adjustable. It has a delicate black plate pendant. The Black Onyx Necklace is presented in a handcrafted box, ready to be given as a gift. The elegant Black Onyx Necklace is 18k gold plated. Palmonas offers a one-year guarantee that covers the supersession of your jewellery. You must provide your original invoice for any replacement.