IMA mineral species

Wüstite

FeO

Iron(II) oxide mineral formed under reducing conditions.

Yellow Brown Gray White & Clear

Wüstite specimen — Wüstite-110970.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness5

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A steel knife scratches it, it won't scratch glass.

Chemical formula	FeO
Elements	Fe, O
Crystal system	Cubic
Mohs hardness	5
Density	—
Streak	—
Color	—
IMA symbol	Wüs
Nickel–Strunz class	4.AB.25

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

Varieties & related stones

Magnesiowüstite

Learn more

Wüstite on Mindat.org
Wikipedia article
Wikidata item Q415889 (source of this page's data – you can correct it there)