This item has the following description:
This stone grants the wearer the ability to regenerate 1 point of damage per 10 minutes. Regeneration works like a ring of regeneration. It only cures damage taken while the character is using the stone.
The description references the ring of regeneration, which has this description:
This white gold ring is generally set with a large green sapphire. When worn, the ring continually allows a living wearer to heal 1 point of damage per round and an equal amount of nonlethal damage. In addition, the wearer is immune to bleed damage while wearing a ring of regeneration. If the wearer loses a limb, an organ, or any other body part while wearing this ring, the ring regenerates it as the spell regenerate. In either case, only damage taken while wearing the ring is regenerated.
Does the Ioun stone therefore grant immunity to bleed damage, and the ability to restore lost body parts as per the Regenerate spell? Would it also recover an equal amount of nonlethal damage?
There is a "cracked" version of this item which has a healing rate of 1hp/hour, but a cost of only 3,400 gp. Would this item also carry the bleed immunity and Regenerate spell effect?