Editing Raw material (section)

===Metallic===
Many raw metallic materials used in industrial purposes must first be processed into a usable state. Metallic [[ore]]s are first [[Ore processing|processed]] through a combination of crushing, roasting, magnetic separation, flotation, and leaching to make them suitable for use in a [[foundry]]. Foundries then [[Smelting|smelt]] the ore into usable metal that may be [[alloy]]ed with other materials to improve certain properties.<ref>{{cite web|url=https://www.britannica.com/technology/materials-processing|title=Materials processing|access-date=8 February 2018}}</ref> One metallic raw material that is commonly found across the world is [[iron]], and combined with [[nickel]], this material makes up over 35% of the material in the Earth's [[Earth's inner core|inner]] and [[Earth's outer core|outer core]].<ref>{{cite journal |last1=Morgan |first1=John W. |last2=Anders |first2=Edward |title=Chemical composition of Earth, Venus, and Mercury |journal=Proceedings of the National Academy of Sciences of the United States of America |date=December 1980 |volume=77 |issue=12 |pages=6973–6977 |doi=10.1073/pnas.77.12.6973 |pmid=16592930 |pmc=350422 |bibcode=1980PNAS...77.6973M |doi-access=free }}</ref> The iron that was initially used as early as 4000 BC was called [[meteoric iron]] and was found on the surface of the Earth. This type of [[iron]] came from the meteorites that struck the Earth before humans appeared, and was in very limited supply. This type is unlike most of the iron in the Earth, as the iron in the [[Earth]] was much deeper than the humans of that time period were able to excavate. The nickel content of the meteoric iron made it not necessary to be heated up, and instead, it was hammered and shaped into tools and weapons.<ref>[https://books.google.com/books?id=DaAmwiJ4rnEC&pg=PA125 ''Understanding materials science'', p. 125, Rolf E. Hummel, Springer, 2004]</ref>