Editing Amethyst (section)

==Geographic distribution==
Amethyst is found in many locations around the world. Between 2000 and 2010, the greatest production was from [[Marabá, Pará|Marabá]] and [[Pau d'Arco, Pará|Pau d'Arco]], Pará, and the [[Paraná Basin]], Rio Grande do Sul, Brazil; Sandoval, [[Santa Cruz Department (Bolivia)|Santa Cruz, Bolivia]]; Artigas, Uruguay; [[Kalomo|Kalomo, Zambia]]; and [[Thunder Bay|Thunder Bay, Ontario]]. Lesser amounts are found in many other locations in Africa, Brazil, Spain, Argentina, Russia, Afghanistan, South Korea, Mexico, and the United States.<ref name=amethnyst-2000>
{{cite journal
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 |url=https://www.gia.edu/doc/Fall-2010-Gems-Gemology-Localities-of-the-2000s.pdf
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 |archive-date=9 October 2022
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}}
</ref>
[[File:Quartz gisements.jpg|thumb|Main amethyst-producing countries]]
[[File:Amethyst Geode.png|thumb|A 3.7 meters tall, 4 ton amethyst geode on display at the [[American Museum of Natural History]] collected from [[Artigas Department|Artigas]], [[Uruguay]].]]
Amethyst is produced in abundance in the state of [[Rio Grande do Sul]] in Brazil where it occurs in large [[geode]]s within [[volcanic rock]]s.<ref>
{{cite web
 |title=Serviço Geológico do Brasil
 |url=http://www.cprm.gov.br/publique/CPRM-Divulga/Canal-Escola/Algumas-Gemas-Classicas-1104.html
 |access-date=31 January 2022
 |website = cprm.gov.br
}}
</ref><ref>
{{cite web
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 |title=Os alemães e as pedras preciosas gaúchas
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</ref><ref>
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 |title = Pedras de ametista são atrativos para turistas em cidade no Norte do RS
 |website = g1.globo.com
 |series = Nossa Terra 2013
 |url = http://g1.globo.com/rs/rio-grande-do-sul/nossa-terra/2013/noticia/2013/07/pedras-de-ametista-sao-atrativos-para-turistas-em-cidade-no-norte-do-rs.html
 |access-date = 31 January 2022
 |lang = pt-br
}}
</ref>
Many of the hollow agates of southwestern [[Brazil]] and [[Uruguay]] contain a crop of amethyst crystals in the interior. [[Artigas, Uruguay]] and neighboring Brazilian state Rio Grande do Sul are large world producers, with lesser quantities mined in [[Minas Gerais]] and [[Bahia]] states.<ref name="amethnyst-2000"/>
[[File:Geode di quarzo ametista dal rio grande do sul, brasile.JPG|thumb|left|An amethyst [[geode]] that formed when large [[crystals]] grew in open spaces inside the rock]]
Amethyst is also found and mined in [[South Korea]].<ref>
{{cite journal
 |first1=K.H. |last1=Yang
 |first2=S.H. |last2=Yun
 |first3=J.D. |last3=Lee
 |year=2001
 |title=A fluid inclusion study of an amethyst deposit in the Cretaceous Kyongsang Basin, South Korea
 |journal=[[Mineralogical Magazine]]
 |volume=65 |number=4 |pages=477–487
 |doi=10.1180/002646101750377515
 |bibcode=2001MinM...65..477Y |s2cid=129368598
 |url=https://pubs.geoscienceworld.org/minmag/article-abstract/65/4/477/140036
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}}
</ref> The large opencast amethyst vein at [[Maissau]], Lower [[Austria]], was historically important,<ref name="EB1911" /> but is no longer included among significant producers.<ref name="amethnyst-2000" /> Much fine amethyst comes from [[Russia]], especially near Mursinka in the [[Ekaterinburg]] district, where it occurs in [[Druse (geology)|drusy]] cavities in [[granitic]] [[Rock (geology)|rocks]].<ref name="EB1911" /><ref name="amethnyst-2000" /> Amethyst was historically mined in many localities in south [[India]],<ref name="EB1911" /> though these are no longer significant producers.<ref name="amethnyst-2000" /> One of the largest global amethyst producers is [[Zambia]] in southern [[Africa]], with an annual production around 1000&nbsp;tons.<ref>
{{cite journal
 |last1=Anckar |first1=B.
 |year=2006
 |title=Amethyst Mining in Zambia
 |journal=[[Gems & Gemology]]
 |volume=42 |number=3 |pages=112–113
}}
</ref>

Amethyst occurs at many localities in the United States. The most important production is at Four Peaks, [[Gila County, Arizona|Gila]] and [[Maricopa County, Arizona|Maricopa Counties]], Arizona, and Jackson's Crossroads, [[Wilkes County, Georgia]].<ref name="amethnyst-2000"/>

Smaller occurrences have been reported in the [[Red Feather Lakes, Colorado|Red Feather Lakes]], near [[Fort Collins, Colorado]]; Amethyst Mountain, [[Texas]]; [[Yellowstone National Park]]; [[Delaware County, Pennsylvania]]; [[Haywood County, North Carolina]]; [[Deer Hill, Maine|Deer Hill]] and [[Stow, Maine]], and in the [[Lake Superior]] region of [[Minnesota]], [[Wisconsin]], and [[Michigan]].<ref name=EB1911/>

Amethyst is relatively common in the Canadian provinces of [[Ontario]] and [[Nova Scotia]]. The largest amethyst mine in North America is located in Thunder Bay, Ontario.<ref name=amethnyst-2000/>

Amethyst is the official state gemstone of [[South Carolina]]. Several South Carolina amethysts are on display at the [[Smithsonian Institution|Smithsonian Museum of Natural History]].<ref>
{{cite web
 |title = South Carolina state gemstone - amethyst
 |date = 24 June 1969
 |website = Sciway.net
 |url = http://www.sciway.net/facts/sc-state-gemstone-amethyst.html
 |access-date=4 February 2016  
}}
</ref>