Cobalt is a hard, silvery-blue metal found in the earth's crust. It's one of the chemical elements, sitting on the periodic table between iron and nickel. Scientists use the symbol Co to represent it.

Cobalt has two main uses that affect your daily life. First, it creates brilliant blue colors in paint, glass, and ceramics. When you see a deep, rich blue in pottery or stained glass windows, there's a good chance cobalt compounds created that vivid color. Artists have treasured cobalt blue pigments for centuries because the color stays bright and doesn't fade.

Second, cobalt is important for making many rechargeable batteries, including some lithium-ion batteries that power laptops, tablets, and electric cars. Inside these batteries, cobalt helps store and release electrical energy efficiently. As more devices rely on rechargeable batteries, cobalt has become increasingly valuable and important.

Today we understand the chemistry better and can handle cobalt safely. It’s extracted from mines in several parts of the world, including Central Africa.