Lightning glass is a material created by Haltamtan mages by instantaneously transmuting sand to magically strengthened glass. Though tricky to work with, this material is stronger than steel and much lighter. Lightning glass is particularly prized in the construction of arms and armor used by many of Haltamti's elite guards.
While some lightning glass is carried east and west from Haltamti along the Golden Path, it sees little use in other regions. Haltamtan smiths are mastered how to shape lightning glass but knowledge of the practice has not spread widely.