What is goethite?

Goethite is a kind of rock that looks like it’s been painted by nature.

Imagine you have a crayon box with red and black crayons. Now imagine someone used both colors to draw on a piece of paper, not neatly, but in a wild, swirling pattern. That's what goethite looks like when you see it up close. It has stripes or bands that change color, like the layers of a cake.

Goethite forms deep underground over a very long time. It’s like when you leave your juice box in the sun, eventually, the liquid turns into a solid. In this case, water with iron in it slowly turns into goethite as it dries out. This process is called mineral formation, and it happens so slowly that it feels almost magical to us!

Sometimes goethite shows up in nature like a striped rock or even inside other rocks, just like how you might find a chocolate chip inside a cookie. People also use goethite to make jewelry, tiny pieces of this colorful rock can become necklaces or bracelets that you wear every day!