Iron is usually found as iron ore on Earth, except for one deposit of native iron in Greenland, which was used by the Inuit people.

The Iron Bridge completed in 1779 was the first cast iron bridge.

Though bronze is generally harder than wrought iron, with Vickers hardness of 60 – 258 vs. 30 – 80, the Bronze Age gave way to the Iron Age ; this happened because iron was easier to find and easier to process.

Bronze was still used during the Iron Age ; for example, officers in the Roman army had bronze swords while foot soldiers had iron ; but, for many purposes, the weaker wrought iron was found to be sufficiently strong.

The term Stone Age implies the inability to smelt any ore, the term Bronze Age implies the inability to smelt iron ore and the term Iron Age implies the ability to manufacture artifacts in any of the three types of hard material.

North Africa and the Nile Valley imported its iron technology from the Near East and followed Near Eastern course of Bronze Age and Iron Age development.

Iron ore was not found in Egypt, making the iron dagger rare, and the context suggests that the iron dagger was valued on a level equal to that of its ceremonial gold counterpart.

Iron, in contrast, has an oxide that forms in air and water, called rust, that does not stop the further oxidation of the iron.

Although belonging to the Bronze Age, they were the forerunners of the Iron Age, developing the manufacture of iron artifacts from as early as the 14th century BC, when letters to foreign rulers reveal the latter's demand for iron goods.

Archaeologists associate the Illyrians with the Hallstatt culture, an Iron Age people noted for production of iron, bronze swords with winged-shaped handles, and domestication of horses.

The Iron Age is the archaeological period generally occurring after the Bronze Age, marked by the prevalent use of iron.

The Iron Age as an archaeological term indicates the condition as to civilization and culture of a people using iron as the material for their cutting tools and weapons.

Lack of archaeological evidence of iron production made it seem unlikely that it had begun earlier elsewhere, and the Iron Age was seen as a case of simple diffusion of a new and superior technology from an invention point in the Near East to other regions.

It is now known that meteoric iron, or iron-nickel alloy, was used by various ancient peoples thousands of years before the Iron Age.

This unnamed drink later went on to be known as Iron Brew because of its connections to the steel ( and iron ) works.

* Iron making – In the Iron industry, coke was finally applied to all stages of iron smelting, replacing charcoal.

Since cast iron was becoming cheaper and more plentiful, it also became a major structural material following the building of the innovative Iron Bridge in 1778 by Abraham Darby III.

Iron salts, such as ferrous sulfate ( made by treating iron with sulfuric acid ), were mixed with tannin from gallnuts ( they grow on trees ) and a thickener.

* Iron Duke is an iron ore mine connected to a port and steelworks at Whyalla, South Australia

Iron ( III ) oxide hydrated is known as rust.

Iron can be incorporated into glass to absorb infrared energy, for example in heat absorbing filters for movie projectors, while cerium ( IV ) oxide can be used for glass that absorbs UV wavelengths.

Iron oxide mixed with aluminium powder can be ignited to create a thermite reaction, used in welding and purifying ores.

Iron is found in the Earth's crust only in the form of an ore, usually an iron oxide, such as magnetite, hematite etc.

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

* Iron oxide nanoparticles

Category: Iron oxide pigments

Iron ( II ) oxide only forms under anoxic circumstances and gives the rock a grey or greenish colour.

Iron ( III ) oxide is often in the form of the mineral hematite and gives the rock a reddish to brownish colour.

Iron oxide deposits give the water a reddish hue, as dissolved ferrous oxide becomes oxygenated at the surface and is precipitated, providing chalybeate waters.

Category: Iron oxide pigments

* Ferric oxide ( Iron ( III ) oxide )

* Iron ( II ) oxide ( ferrous oxide )

# REDIRECT Iron ( III ) oxide

Iron oxide staining caused by Infrastructure # Water management infrastructure | reticulation from an unconfined aquifer in karst topography.

Iron oxide pigment

* Iron oxide nanoparticles

Category: Iron oxide pigments

simple: Iron oxide

# REDIRECT Iron oxide # Hydroxides

Iron and magnesium typically give the obsidian a dark brown to black color.

On each show, a challenger, typically a famous chef from Japan or elsewhere, is pitted against one of the Iron Chefs ( with each Iron Chef specializing in a different kind of cuisine — Japanese, Chinese, French, and later Italian ).

Detention in the Bastille was typically ordered for an indefinite period and there was considerable secrecy over who had been detained and why: the legend of the " Man in the Iron Mask ", a mysterious prisoner who finally died in 1703, symbolises this period of the Bastille.

The Iron Cross () is a cross symbol typically in black with a white or silver outline that originated after 1219 when the Kingdom of Jerusalem granted the Teutonic Order the right to combine the Teutonic Black Cross placed above a silver Cross of Jerusalem.

They are typically European and of the Bronze and Iron Ages.

Iron ( III ) hydroxides can form over a larger pH range including pH levels lower than are effective for alum, typically: 5. 0 to 8. 5.

Iron supplements are typically used to treat anemia.

Harris frequently writes lyrics about mythology, history or topics inspired from books and films, for which Iron Maiden has become notable in sharp contrast to most other rock bands where the themes are typically sex, drugs and rebellion.

* The Anxi Iron Goddess Tea 安溪鉄観音-This oolong is typically close to a green tea, with only a little oxidation.

Iron sights are typically composed of two component sights, formed by metal blades: a rear sight mounted perpendicular to the line of sight and consisting of some form of notch ( open sight ) or aperture ( closed sight ); and a front sight that is a post, bead, or ring.

At the end of their live set, during the " Iron Maiden " song, a fish-tank pump was used to squirt fake blood out of the mask's mouth, which typically covered their drummer, Doug Sampson.

The British Iron Age is a conventional name used in the archaeology of Great Britain, referring to the prehistoric and protohistoric phases of the Iron-Age culture of the main island and the smaller islands, typically excluding prehistoric Ireland, which had an independent Iron Age culture of its own.

A case has been made for artistic continuity in Europe from the Bronze Age, and indeed the preceding Neolithic age however archaeologists generally use " Celtic " to refer to the culture of the European Iron Age from around 1000 BC onwards, until the conquest by the Roman Empire of most of the territory concerned, and art historians typically begin to talk about " Celtic art " only from the La Tène period ( broadly 5th to 1st centuries BC ) onwards.