Gem

The Gem is a famous huge regenerative crystal in the middle of the Inferno-Posideon Stretch that emits large quantities of unaligned elemental energy. It is used as the source of material of Crystal Blades, but the immense energy requirements of manufacturing even one, and the fact that regenerated sections take a long time to reach their peak of power, means that Crystal Blades cannot be mass-produced. Once removed from it, fragments may be imbued with elemental power, and they will transform into an Elemental Gem. The oldest parts of the surface seem to never have been touched; these are sometimes considered sacred, but one sword-shaped portion went missing several centuries ago.