The Ether Mine is an excellent source of Ether Cylinders for making Gems. After Xord is defeated for the second time, the Ether Mine cannot be accessed any longer; only the cave remains accessible. After the reconstruction of Colony 6 begins, each time the level of Nature in the colony is increased, beyond level two, the ether crystals in the mine raise their level in turn. It is said that the Mechon attacked Colony 6 in order to gain control of the mine, as it would allow them to fuel raids along all of Bionis.