Luspeel

Luspeel was the Realms name for a hardstone known as magnetite or lodestone.

Description
Luspeel was naturally magnetic and was occasionally used in the floors of temples to subtly encourage piety--a kneeling worshiper felt his or her weapons and armor being gently stuck to the floor. A typical price for large quantities of this hardstone was 3 gp per pound (0.45kg).

Powers
Luspeel was generally useful in the manufacture of magical items, and especially necessary for tempering swords that were intended to be bound with multiple enchantments.