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Goethite
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== Usage == Its main modern use is as an [[iron ore]], being referred to as ''brown iron ore''.<ref name=Mindat/> Goethite is an important component of [[ochre]] pigments,<ref>{{cite journal |last1=Hradil |first1=David |last2=Grygar |first2=Tomáš |last3=Hradilová |first3=Janka |last4=Bezdička |first4=Petr |title=Clay and iron oxide pigments in the history of painting |journal=Applied Clay Science |date=April 2003 |volume=22 |issue=5 |pages=223–236 |doi=10.1016/S0169-1317(03)00076-0|bibcode=2003ApCS...22..223H }}</ref> and has been heat-treated for use as a red pigment since [[Paleolithic]] times.<ref>{{cite journal |last1=Cavallo |first1=G. |last2=Fontana |first2=F. |last3=Gialanella |first3=S. |last4=Gonzato |first4=F. |last5=Riccardi |first5=M. P. |last6=Zorzin |first6=R. |last7=Peresani |first7=M. |title=Heat Treatment of Mineral Pigment During the Upper Palaeolithic in North-East Italy: Heat treatment of mineral pigment during the Upper Palaeolithic |journal=Archaeometry |date=October 2018 |volume=60 |issue=5 |pages=1045–1061 |doi=10.1111/arcm.12360}}</ref> Iron-rich [[laterite|lateritic]] soils that have developed over [[serpentinite]] rocks in tropical climates are mined for their iron content, as well as other metals.<ref>{{cite journal |last1=Frasche |first1=Dean F. |title=Origin of the Surigao iron ores |journal=Economic Geology |date=1 May 1941 |volume=36 |issue=3 |pages=280–305 |doi=10.2113/gsecongeo.36.3.280|bibcode=1941EcGeo..36..280F }}</ref> Fine goethite specimens are rare and therefore are valued collectibles.<ref name=Sinkankas1964/> Banded or iridescent varieties are cut and polished into [[cabochons]] for jewelry making.<ref>{{cite journal |last1=Gosse |first1=Ralph |title=Notes on Rare and Unusual New England Gemstones |journal=Rocks & Minerals |date=October 1968 |volume=43 |issue=10 |pages=753–756 |doi=10.1080/00357529.1968.11765131|bibcode=1968RoMin..43..753G }}</ref> In a royal tomb of the ancient kingdom of [[Phrygia]], a body was found believed to be King [[Gordias]], father of the legendary King [[Midas]]. The burial shroud had been colored with a dye containing goethite, which in its original unfaded state would have made the shroud look like it was woven from gold. Historians speculate that the legend of King Midas' golden touch might have originated from Phrygian royalty wearing clothes made from such golden-colored textiles.<ref>{{cite book |last1=Ballard |first1=Mary |title=The archaeology of Phrygian Gordion, royal city of Midas |date=2012 |publisher=University of Pennsylvania Museum of Archaeology and Anthropology |location=Philadelphia |isbn=9781934536483 |pages=15, 165–169 |url=https://books.google.com/books?id=TUkiGrcsN28C&q=goethite |access-date=8 April 2022 |chapter=King Midas' Textiles and His Golden Touch |editor-first1=C. Brian |editor-last1=Rose}}</ref><ref>Archived at [https://ghostarchive.org/varchive/youtube/20211211/NPgZhBagmbk Ghostarchive]{{cbignore}} and the [https://web.archive.org/web/20160830231151/https://www.youtube.com/watch?v=NPgZhBagmbk&gl=US&hl=en Wayback Machine]{{cbignore}}: {{cite web|last1=Rose|first1=Brian|title=Great Myths and Legends: The Golden Age of King Midas|url=https://www.youtube.com/watch?v=NPgZhBagmbk|publisher=Penn Museum|access-date=27 August 2016}}{{cbignore}}</ref>
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