There should be a Iron Stone Association member at the south mountain foot of Twin Lion Mountain. He may have some information for you.
Though I don't know him quite well and we were not on the same boat, I heard him mention about the Shock Crystals once. Maybe you can ask him about these things.
Hello, I am Resar, I am an officer of the Iron Stone Association. How may I help you? Resar was originally looking at the volcano, but greeted you as soon as he sees you.