Gem-like crystal unique to Gaea and Atlantis. The many attributes that the numerous varieties hold range from the mudane (the ability to power Guymelefs and ships) to the supernatural (apparent powers of divination). The color is an indication of the potency of the energist: red being the most powerful, followed by purple and green. The most powerful of all physical energists are drag-energists, energists which have been purified after dragons swallow ore deposits. However, not all energists are physical .
In Katsu-Aki's shounen manga version, energists are also given the kanji appellation seihouseki, or divine jewel.