Wüstite

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

In collections

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What Wikipedia says

Wüstite (FeO, sometimes also written as Fe0.95O) is a mineral form of mostly iron(II) oxide found with meteorites and native iron. It has a grey colour with a greenish tint in reflected light. Wüstite crystallizes in the isometric-hexoctahedral crystal system in opaque to translucent metallic grains.

Excerpt from the Wikipedia article “Wüstite”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Pavel M. Kartashov, CC BY-SA 3.0, via Wikimedia Commons.