The Aurora Stone was possibly the largest crystal in existence in a refined state; at one time, it was placed in beacon tower on Terra Atmosia. It was stolen by Master Cyclonis to power her Storm Engine though later destroyed by Aerrow to save Atmos. People from Terra Atmosia managed to pick up the remaining pieces of the Aurora and placed them in Altar in the Beacon Tower. While the stone was in its altar the surrounding weather was sunny with slight white clouds. When the stone was taken by Cyclonia the skies became dark and stormy.