The Sun Stone is a Key Item in Chrono Trigger. The stone requires constant exposure to sunlight for several million years before storing enough to generate power. When the stone dims from use or lack of sunlight, it is known as Moon Stone. Able to store solar energy within its spherical surface, it releases beams of light when struck, as demonstrated by Taban during the Moonlight Parade in Leene Square. In an optional quest, this item is obtained by leaving Moon Stone in the Sun Shrine from Prehistory to the Future.