Sillimanite

Sillimanite is a special type of rock that is made up of tiny particles called minerals. These minerals are very interesting because they can resist heat and pressure really well. Imagine if you had a toy that was really strong and didn't break no matter how much you squeezed or stepped on it, that's what sillimanite is like.

Sillimanite is found in the Earth's crust, which is like the skin on an apple. The crust has different layers and sillimanite is usually found in the middle layer, which is called the metamorphic layer.

People use sillimanite for different things because of its special abilities. It can be used to make really strong bricks for buildings and furnaces, and it can also be used to make special types of pottery.

Sillimanite is sometimes called a "mineral superhero" because of how strong and tough it is. Just like how superheroes can do amazing things, sillimanite can withstand a lot of pressure and heat without breaking.