The Black onyx heart pendant necklace showcases black onyx stone with a minimal design. expertly soldered onto an 18kt yellow gold plated chain. The pendant is adorned with high-quality cubic zirconia stones that are meticulously set using an invisible prong technique, enhancing its overall aesthetic. DETAILS Length: 16 inches with extension Material: Stainless-Steel Closure: Lobster Clasp Finish: 18KT Yellow Gold Plated Hypoallergenic, Tarnish proof, Waterproof. Care instructions for gold-plated products (stainless steel and silver): Avoid contact with water, sweat, perfume, hairspray, and other chemical substances to prolong the lifespan of the gilding. Store gilded products in a soft pouch or jewelry box to avoid scratches. Carefully clean the surface with a soft, dry cloth – do not use abrasive cleaners or polishing cloths.