In the mines, you can find two ores, Hubolite and Glutite (totally not copied off Arlemite and Rupee). You can make weapons with each one of them. A blade for Hubolite and Trident for Glutite. Ore, you can make Chaos Bars (Not copied off of shadow bars made out of Arlemite and Rupee :D) Chaos bars are used in many different recipes.