Ghost dust

&nbsp Ghost dust is a substance used by Harry Dresden in the book Grave Peril to combat ghosts.

Ingredients
Though the list of ingredients is incomplete, Harry does mention a few of them: depleted uranium, cold iron, basil, an dung og some sort.

Affects
Harry describes the dust as being "something extra-real, that it was heavy and inert and locked spiritual atter into place when it touched it."

On ghosts
The dust is able to affect the ghost even in the mortal plane. Upon contact, it sparks into "blazing motes of scarlet light", apparently causing them pain and immobilizing their ectoplasmic flesh.

In the Nevernever
In the Nevernever, the weight of the ghost dust increases significantly, weighing "thirty or fourty pounds". Harry believes that if released, it would tear a hole in the Nevernever.

Appearances

 * Grave Peril