Gold filled cz tennis necklace with cz tear drops Chain length: 16" with a 2" extension Clasp: spring ring Material: 18 karat gold filled, hypoallergenic, nickel-free Handmade with love in the usa. 18 karat gold filled does not de-laminate or peel like gold plated jewelry nor does it tarnish as readily. Generally speaking, gold filled is better quality and will have a much longer lasting color than plated jewelry. to clean gold-filled it is best to use mild soap and water.