Warsptone is a fictional material in the Warhammer Fantasy setting. It is solidified chaos energy in the form of green, glowing crystals.

Warpstone is highly sought after by the subterranean rat-men know as the Skaven, who use warpstone as either currency, drugs and power-sources to fuel their weapons and machinery. The sorcerer castes of the Skaven (such as the Grey Seers, Warlock-Engineers and Plague Priests) use warpstone to boost their magics.