iron oxide
ferric oxide

The red color comes from iron oxide in their mineral structure.

The people may have painted their bodies using red iron oxide.

The yellow that you see in the little holes is an iron oxide.

Rust is a general term for a series of iron oxides.

The iron oxide process requires an efficient source of heat.

The dark red colour of these rocks comes from iron oxide.

The active material of the negative plates is iron oxide.

"Iron oxide has many interesting properties, it turns out," he said.

There is also yellow, brown, and black iron oxide.

The colour is caused by iron oxides in the rock.

Now he owned iron oxide tapes; they did not melt.

Duller ones are iron oxide, like you find in soil.

Modern versions are frequently made with synthetic red iron oxide.

This iron oxide is encountered in the laboratory as a black powder.

This allows iron oxides to be used as part of the coloring process.

Yellow or red soil indicates the presence of iron oxides.

The soil, they believe, contains an iron oxide that often forms in the presence of water.

Both use a thin plastic base material coated with iron oxide.

She was smearing her hands with iron oxide, to simulate blood.

With addition of iron oxide, they act as efficient heat absorbers.

It reduces the iron oxide and is itself subject to oxidation.

He's got a lot of iron oxide in his clay.'

The ground there is red because of iron oxide (rust) in the rocks and dust.

Iron oxide gives the sand a red tint, particularly when the sun is low.

All together, there are sixteen known iron oxides and oxyhydroxides.