Silver tone metal, chain link necklace with a tree of life pendant. I can't find any markings so I do not know the brand and do not think this is sterling. The trunk of the tree is designed like a DNA strand. Lobster claw clasp. Drop is about 10.5". The necklace measures about 19" and has about a 2" extender on it so you can shorten if need be. In great pre-owned condition with little to no signs of wear.