Age of Sigmar Wiki

Sigmarite is a magical, living metal used by the God-King Sigmar in the creation of the armour and weapons of the Stormcast Eternals.

Each weapon forged of sigmarite has a fraction of the might of the Realm of Azyr; every blow struck unleashes the power of a thunderclap, the flight of every sigmarite-tipped arrow echoes the fury of lightning.

Sigmarite is mined from Mallus, the surviving core of the World-That-Was that now hangs above the God-King's palace city of Sigmaron in Azyr.