The Tree of Life design has been cast in both silver and bronze to make a beautiful necklace or cuff bracelet. The necklace comes with an adjustable leather cord and can be changed to any necklace string. The concept of a tree of life has been used in science, 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.