The Man-stone is the Eari Stone that was created to symbolically represent the human race. This stone was to be housed in Gadonia after the Great Purge, but during the extermination campaign it was ultimately stolen by the Meninar, who took it to the island of Vir (where it remains to this day).
Post-Purge
The Meninar, who were susceptible to the powers of the Eari Stones, had stolen the Man-stone in an effort to stem the destruction caused by the Purge by getting it away from the Tal Calar who wielded it. The locked it away among the mountains on the southern reaches of the island of Vir. Over time, it came under Vurg control, where it is locked away in a floating vault because of the nonstop rain that the area experiences.