Blue Gem Stone

 is a special gemstone which emits blue light. Blue Gemstone can drastically improve the health of anything organic, such with water, crops, and humans. Continual consumption of Blue Gemstone puts humans in a perfect state of health. The gemstone is rumored to be a rock from an alien planet. It emits a strong blue light, hence the name.

Overview
Sometime after 4th War, Comato and Shinzui fought over the possession of this stone. It was revealed that the gas gaseous form of this gemstone when inhaled can cause hallucinations.