Kosem stones are magical gems that are able to absorb wild magical energy. For those that do not have an innate ability to alter wild magic into tamed magic, kosem stones can be used as a focus. It is an essential part of a wizard’s ability to use magic, and is also necessary to create and use magical items.
Kosem stone deposits can be found anywhere, deep in mountains, or close to the surface. However, they are rare throughout most of Hareitz, except in certain locations within the Magelands.
Many wars have occurred over gaining access to these valuable stones.