Crystite is a mineral gem that absorbs El energy. When refined it's used in making automatons and various magical items.
Crystite is a magical gemstone from the series Blessing of Campanella .It's an ore that absorbs the magical energy called El energy. It's more commonly used once refined. The gem is used by humans in crafting certain magical items, and it's used as a power source in the stringless puppets called automatons.
At times when the crystite absorbs too much El energy. It can cause the gem to become what is called a Crystite Monster (ほうせきモンスター, houseki monsutaa).