The Tree of Life is a concept that’s been featured in myth, folklore and religion literally all around the world. Since ancient times, people have used variations on the theme. Connecting all things – the realms of the spirit, the physical, the divine and the mundane – the roots of the tree and the branches touch all things and bring them together in harmony.
In the 13th to 6th century BC, the tree of life decorated fortresses and the armor of ancient Armenians which is not surprising since it symbolized immortality. The tree of life is also in the Bible’s Book of Genesis and was a part of the old Norse religion. More modern uses of the symbol include the tree of life in science (phylogenetic tree) which is used to depict evolutionary lines and the anatomical term arbor vitae (Latin for tree of life) for the branching tree-like appearance of the brain’s cerebellum.
I used this tutorial for my necklace, which has very detailed step by step instructions and pictures, but there are lots of other pictures out there as well.