Adamantine is an ultrahard metal found in meteorites and extraordinary mineral veins. In addition to being used to craft *adamantine armor*, the metal is also used for weapons. Melee weapons and ammunition made of or coated with adamantine are unusually effective when used to break objects. Whenever an *adamantine weapon* or piece of *ammunition* hits an object, the hit is a critical hit. The adamantine version of a melee weapon or of ten pieces of ammunition costs 500 gp more than the normal version, whether the weapon or ammunition is made of the metal or coated with it.