Astralwood

"Astralwood grows on the dead bodies of the old Powers of Nature. It is no real wood, but a mixture of the God's essence and Astral energies. "I know of no effects bringing it to the Prime or Inner Planes; it slowly dissolves in the Ethereal; and it adapts in the Outer Planes. That is, wherever you bring it in the Outer Planes, it will not be harmed by the environment, and it will appear like an item crafted on that plane - so much that even spells consider it an original item of that plane. "That is what I know of Astralwood. Oh, and it is rare and expensive."- the words of a well travelled planar