gold

Gold is a very rare substance making up only five ten-millionths of the Earth's outer layer. Gold is the most malleable( A malleable metal can easily be deformed, especially by rolling, without cracking)and ductile metal.Gold is a good conductor of heat and electricity and it is highly unreactive, and is not affected by air and most reagents. Heat, moisture, oxygen, and most corrosive agents have nearly no chemical effect on gold, making it well-suited for use in coins and jewelry.