Phosphoric Phylactery – sacred geometry magic alchemy symbol design of inner light.
Phosphorus – "Alchemists felt that light represented the spirit. The non-metallic element phosphorus was of interest because of its apparent ability to contain light, as evidenced by the characteristic glow-in-the-dark phosphorescence of phosphorus compounds. "
Phylactery – “An amulet or charm, worn for its magical or supernatural power. In alchemy, it was an object enchanted to contain one’s soul to achieve immortality.”