A large, luminous crystal used in the Ancient Shrine of the Maerum. Four of these crystals need to be placed on the altar and properly aligned to activate it - April retrieves them and reveals the murals concerning the true nature of the Maerum and the Alatien.
The loss of these crystals may be why the altar ceased to work and the temple eventually became abandoned. The Maerum Queen has one of the crystals in her home, saying that one of the Maerum children found it and she was simply using it for decoration.
Obtained from the Maerum Queen, the seaweed, and at the foot of the altar.