Gold is the most malleable and ductile of all metals.

Silver tarnishes more these days because of sulfur pollution from power plants.
Before the Industrial Revolution, silver hardly tarnished at all.

Aluminum is the third most abundant element in the earth's crust. However, since it's never found in a pure state the refining process makes it one of the more expensive metals. Aluminum is everywhere -- many gemstones, for example ruby and sapphire, are mainly crystalline aluminum oxide (Al2O3). In addition, many of the world's top performance vehicles, like the Ferrari 360 Modena and the Audi A8, are 100% aluminum, since it's lighter than steel but at least twice as strong.