Pale orange rhomboid and shawl of life keeping

[Epsilon]

Say I stored 10 hit points and healed up but later I was insta killed by a mob. Once the battle is over I return to my body using the ioun stone meaning I would be at (-(con-1)) hit points.
Would the shawl of life keeping activate after I revived my self using the ioun stone?
The shawl heal when you drop below -1 health, but it makes an exception if the damage is enough to kill you the shawl won't do anything. Although I could be misinterpreting what the shawl does. Since the line (This healing cannot prevent the wearer from being killed.) Implies that it won't go off if the damage done is enough to kill you.

Shawl of Life-Keeping 1,000 Gold
This magical shawl is woven from silken, diaphanous material. Once per day, the wearer can speak a command word to transfer some of her life energy into the shawl (up to 10 hit points). If she is wearing the shawl and is reduced to –1 hit points or below, the shawl immediately heals her an amount equal to the number of hit points stored in the shawl. This healing cannot prevent the wearer from being killed. The life energy stored in the shawl lasts for 24 hours or until it heals the wearer, whichever comes first. If the shawl is destroyed, the stored life energy is lost.

Pale Orange Rhomboid 200,000 or (12,000 for Flawed)
This stone absorbs your soul as the magic jar spell immediately prior to your death. You can't transfer your soul from the ioun stone receptacle to another creature's body, and are, for all intents and purposes, dead. While your soul is in the ioun stone, you can sense any life forces within 120 feet as though you were placed in a magic jar. At any point within 12 hours of your soul's transfer into the pale orange rhombus ioun stone, you can return to your body as long as it is within 120 feet of the ioun stone. Upon returning to your body, you are unconscious and dying with a number of negative hit points equal to your Constitution score minus 1. If you fail to stabilize and aren't healed after 1 turn, you die and your soul is not absorbed by the ioun stone. Your soul can be absorbed into a pale orange rhombus ioun stone only once per 24-hour period.

[Bronnwynn]

If you're instant-killed, the healing still goes off. It just can't stop you from dying.

[Shiroi]

But this doesn't mean you start with -Con Score +11 Health, either, because the healing would happen the turn you died, so your next turn you could go back into your body if you wanted. The problem is that the Pale Orange Rhomboid specifies how much life you have left when you go back into the body. So even though your body might be 10 HP above dying, that drops to 1 HP above dying the moment you go back into your body.
A better way to take advantage of this is Die Hard, which allows you to go deeper past your Con Score before dying, but even then a DM might read into "If you fail to stabilize and aren't healed after 1 turn" and say that regardless of whether your HP goes to "dead" again, you still can't reenter your body properly if you don't stabilize or get healed on the first turn. RAW is murky here, and RAI not much better.

[Epsilon]

With diehard you automatically stabilize.

[Shiroi]

Epsilon wrote:

With diehard you automatically stabilize.

*rereads diehard* Well, that makes the Rhomboid very useful. Two or three of those and I can be a real Jack Harkness.

So what was it that I was thinking of, where you don't die till like -double your con score? *scratches head*