Fate Crystals are small crystals that house someone's Book of Fate.
Fate Crystals are octahedron shaped crystals that are about an inch big. The crystals are often the same color as the owner's aura and have a small glow to them.
Fate Crystals act as housing for an individual's Book of Fate. They reside inside the owner until an Editor draws them out in order to review that person's Book of Fate.