*The green stones are untreated (Type A) Guatemala Jadeite Jade. *The white and yellow stones I believe they are CZ stones (I am note 100% sure). *The metal is S925 sterling silver. *There are three parts: the necklace (the length is 21.5CM with extension), the hook and the pendant (26MMX17MMX6MM). *Jade: In Chinese culture, people called "Jade" as "Yu(玉)." Chinese people believe that jade brings people a lot of blessing such as health and wealth.