Product Details — Material: 18K Gold Plated / Platinum Plated Sterling Silver with Cubic Zirconia Size of Pendant: 10x8mm Length of Chain: 40cm + 5cm extender *Lead, Cadmium and Nickel Free Gold Plated Sterling Silver Jewelry — Gold Plated Jewelry is Sterling silver base that has been coated with gold plating. Using harsh chemicals or cleaning harshly with polishing cloth can damage gold plating and reveal the sterling silver base color underneath. Gold plating is meant to be permanent, but like all types of plating, it doesn’t handle rough exposure well. Gold plating wears out over time and can flake off, exposing the base metal underneath. In general, plating can last for up to two years with proper care. Allergies depends on your own skin. Everyone has a different type of skin, but all our products are nickel-free. Show some love for your jewelry by taking care of them, wiping them of oil residues after wear and storing them in the dry place. It’s best to take off your jewelry before you shower, put lotion on, spray your perfume, go for a swim, exercise etc. More jewelry care instructions included in your package.