This is the symbol of the unity of all the Elements. They say David had this star on his shield when he went to fight Goilth but there is no bibliological proof of it. The star was an alchemist star way before the star of David.
The symbol is a unalome, a representation of the journey to reach enlightenment. The path starts in the centre of the spiral, and as you continue up or down this path you are wandering, becoming more conscious of your surroundings.