Mana Metal Ore

Mana metal ore were the terms for special ores in that world that could transmit mana. These types of metal was really valuable because it was not that easy to find metals that could transmit mana. Once found, they would be grabbed by big families or other power such as the association. 

The mana metal ore had to be smelted and then mixed with some other metals to be forged into weapons, tools, and many other things.

It was commonly used in that world.

But the final product would have been mixed with other metals and the higher the concentration of the mana metal ore, the more valuable it is. Unfortunately, it was not that easy to make things with high concentration of mana metal ore.

Without enough skills, the final product would not be strong enough to fulfill their intended purpose. 

But that was fine.