A Little about Iron.

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Iron comes in a variety of colors.





Let's begin with Limonite. Limonite is Iron + water. FeO(OH)·nH2O, = Yellow in color.



Next comes Hematite, Iron oxide, He2O3, Red, Silver grey to black.



When Limonite dries out it turns into Goethite- Bog iron, or needle ore.









Iron Carbonate looks like and is called "beer bottle Ore."





Iron and sulfur make Pyrite "Fools Gold."





As sulfur is removed, Pyrite changes back to Hematite.



Most people are unaware that Pyrite may become iridescent.



So can Hematite -







and Goethite!





Those layers make possible Fire Agate.

[Admin]

Magnetite deserves a space all to itself.

Not all Magnetite is Naturally Magnetic. It is thought that lightning strikes starts electron circulation Which continues.

The chemical composition of magnetite is Fe2+(Fe3+)2(O2-)4. This indicates that magnetite contains both ferrous (divalent) and ferric (trivalent) iron, suggesting crystallization in an environment containing intermediate levels of oxygen.

The structure is inverse spinel, with O2− ions forming a face-centered cubic lattice and iron cations occupying interstitial sites. Half of the Fe3+ cations occupy tetrahedral sites while the other half, along with Fe2+ cations, occupy octahedral sites. The unit cell consists of 32 O2− ions and unit cell length is a = 0.839 nm.



Pyramid


Cubic


With Calcopyrite


From he Iron County Smith Mine


Sand