Science / Geology / Hematite: An iron oxide mineral that is commonly used as an ore of iron. Picture of Hematite.


Life Style / Painting / Burnisher: An instrument to polish either a metal surface or other substance that will take it. It is either shaped from hardened steel or the semi-precious stone, agate. In the 15th century Cennini in il Libra MORE

Iron (Fe)

Science / Periodic Table of Elements / Iron (Fe): Atomic number: 26, Atomic mass: 55.85 g.mol -1, Electronegativity: 1.8, Density: 7.8 g.cm-3 at 20°C, Melting point: 1536 °C, Boiling point: 2861 °C, Vanderwaalsradius: 0.126 nm, Ionic radius: 0.076 MORE

Iron Ore

Science / Geology / Iron Ore: A chemical sedimentary rock that forms when iron and oxygen (and sometimes other substances) combine in solution and deposit as a sediment. Hematite is the most common sedimentary iron ore mineral. Pi MORE

Banded Iron Ore

Science / Geology / Banded Iron Ore: A rock that consists of alternating layers of chert and iron oxide mineral (usually hematite) with the iron oxide in high enough concentration to be of economic value. MORE