The ring is made out of a primal mineral which existed before the moon's final solidifying form. The stone has turned to mist over time and ceased existing altogether. but remains in physical form due to the memory of the wearer. Who is the wearer? I doubt it's really a man, it's more akin to a memory in reverse, of what would soon inhabit the planet accompanying the moon.
Due to the AI-fication of the piece, these themes are obscured more or less. :)