What Makes Rocks Red?

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How Was Red Rocks Formed?....5

Rocks are red when they contain the mineral hematite, which is an iron oxide that is similar to rust. Find out how iron forms a reddish hue when oxidized with help from a lab manager and research scientist in this free video on rocks.

Part of the Video Series: Identifying Rocks
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Video Transcript

Hi this is Jane Stammer from the Colorado School of Mines and I'm here to answer questions on what makes rocks red. Rocks are red when they contain the mineral hematite. Hematite is a iron oxide. Iron in the mineral hematite is in it's oxidized state and similar to rust that you would find on a car or some other material when iron is oxidized it forms a reddish hue and the mineral hematite contains iron in this state. And that is what makes rocks red.

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