Calcium is in milk, bones, teeth, shells, pearls, chalk, plaster, cement, and other white things. Scandium causes the blue-green color in aquamarine gems. Titanium is the strongest pure metal and is used in high-performance jets. Vanadium steel is resilient and is used in springs. Chromium is shiny and is used in car trim.
Manganese steel is tough and is used in rock crushers.
Iron is the most commonly used metal. Steel alloys are mostly iron. Vehicles, machines, and buildings are made of steel. Iron can be used in magnets. Iron makes blood red.