Human- People who have not awoken their cores and have no access to Chi.
Base- Those with an awakened core.
Stone- People who have undergone body rebirth. A tempering of the flesh that not only extends their lifespan but increases all physical characteristics to super human levels.
Sapphire- Development of an aura, which is a passive manefestation of their control over chi.
Ruby- Rumored to be a second rebirth of the body, other unkown effects.
Emerald- ???
????- ???