And these ingredients seem to only be made by people with high steel-working skills. But with my skills, it seems that I am able to extract Prani Ore by myself.
Originally, Prani Ore was a soft, cheap, malleable metal that was used to increase the volume of gold products.
It made something like Gold Alloy, and if too much Prani was added, the value would decrease.
It seems Itsuki was able to feed it to his bow to produce other valuable ingredients.
I will probably have to learn some Metal Working Skills. That way, I could mold the items sold by stores into more valuable materials.