This Tree of Life necklace is made of small irregular pearls for the branches and the trunk is either Copper or Silver. Hangs on a 24″ long silver chain. The concept of a tree of life has been used in biology, religion, philosophy, and mythology. A tree of life is a common motif in various world theologies, mythologies, and philosophies. It alludes to the interconnection of all life on our planet and serves as a metaphor for common descent in the evolutionary sense. The term tree of life may also be used as a synonym for sacred tree.