Why Is Tungsten-lead Ore Difficult To Identify?

What are minor metals? A minor metal is not the name of a particular type of metal, but a collective term for a group of metals. Small metal refers to the basic metals (iron, copper, lead, zinc, aluminum, nickel) and rare metals (gold and silver, platinum, palladium, ruthenium, rhodium, iridium) in addition to other non-ferrous metals.