Metal is a sub-element of earth. It is derived from earth and harvested from the earth. Even in small quantities, metal is dangerous. Lead for example, if consumed, can be harmful to the body. Same with Mercury. On the other hand, metal can be helpful when consumed, like Iron and Potassium. Even some "heavy Metal" can give your body some diseases. Parkinsons, Dementia and Multiple Sclerosis have all been linked to consumation of Lead, Mercury and Aluminum.
Being used by a Strong Earth Elemental, metal can have the potential to be deadly. Only 27% of the soil of Earth is some-sort of Metal. So in it's rarity, many seek it out to make weapons, etc out of it. Be very careful when harnessing Metals as you use it.
Here is a list of metals found on earth:
Lithium
Cesium
Beryllium
Berium
Magnesium
Lanthenum
Sodium
Halnium
Aluminum
Tentalium
Potassium
Tungsten
Calcium
Rhenium
Scandium
Osmium
Titanium
Irdium
Vanadium
Platinum
Chromium
Gold
Manganese
Mercury
Iron
Thalium
Cobalt
Lead
Nickel
Bismuth
Copper
Polonium
Zinc
Francium
Gallium
Radium
Germanium
Actinum
Rubidium
Unnilquadium
Strontium
Unnilpentium
Yithium
Unnilsepium
Zirconium
Unniloctium
Niothium
Unnilendium
Molybdenum
Ununnilium
Technetium
Unununium
Ruthenium
Ununbium
Rhodium
Ununinum
Palladium
Ununquadium
Silver
Ununpentium
Cadmium
Ununherium
Indium
Ununseptium
Tin
Ununoctium
Antimony
Cerium
Prasnodymium
Terhium
Neodymium
Dysprosium
Promethium
Holmium
Semarium
Erbium
Europium
Thulium
Gadolinium
Ytterbium
Lutetium
Americium
Thorium
Curium
Protactinium
Berkelium
Uranium
Californium
Neptunium
Einsteinium
Plutonium
Fermium
Mendelevium
Nohelium
Lawrencium
Periodic Table of Elements.
