Heartstone

This article is about the magical object. For the substance in the Wheel of Time book series, see One Power. For the Sansom novel, see Heartstone (Sansom novel).

A heartstone is a fictional artifact common in dragon-related stories of high fantasy. It is a crystal of concentrated magic, and can be extracted from the heart of a slain dragon. It is believed that the heartstone is the source of a dragon's magic power, but this has never been proven definitively. Heartstones were considered a precious commodity in the Middle Ages, and were coveted for their wizard killing abilities. Generally the magnitude of a heartstone is directly related to the size of the dragon itself, though this is not always the case.

Concerning color and density, a heartstone will vary from dragon to dragon, the most common color is a shade between black and red, but heartstone colors ranging from yellow to violet have been recorded.

It is believed that a heartstone containing enough magic can be used in the manufacture of a Philosopher's Stone. However, this is only a theoretical conjecture.