5 Delightful Color-Changing Minerals

5 Delightful Color-Changing Minerals

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From corundum to alexandrite, there are rare minerals have multi-colors caused by how they form their structure!

Hosted by: Hank Green

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Sources:
https://www.gemsociety.org/article/what-is-gemstone-pleochroism/

Geology Word of the Week: P is for Pleochroism


https://nature.berkeley.edu/classes/eps2/wisc/pleo.html
https://www.gia.edu/gems-gemology/fall-2014-introduction-pleochroism-faceted-gems
https://www.sciencedirect.com/topics/chemistry/pleochroism
https://www.mpp.mpg.de/~bangert/Mineralogy/crystal.html
https://www.gemsociety.org/article/gemstone-birefringence/#Pleochroism
http://www.geo.utexas.edu/courses/347k/redesign/Gem_Notes/Corundum/corundum_main.htm
http://minerals.gps.caltech.edu/FILES/Visible/corundum/Index.html
https://www.mindat.org/min-1128.html
https://www.gemsociety.org/article/mineral-habits/#The_Orthorhombic_System
https://nature.berkeley.edu/classes/eps2/wisc/cordierite.html
https://www.pizzacraft.com/blogs/pizzacraft-blog/67415619-ceramic-vs-cordierite-stones-vs-baking-steels
https://www.gia.edu/iolite-description
https://www.mindat.org/min-217.html
http://minerals.gps.caltech.edu/FILES/Visible/Andalusite/Index.html
https://link.springer.com/article/10.1007/s00269-010-0397-9#Sec1
http://scienceworld.wolfram.com/chemistry/IntervalenceChargeTransfer.html
http://www.webexhibits.org/causesofcolor/8.html%22
https://www.gia.edu/doc/Gemstones-with-Alexandrite-Effect.pdf
https://www.gemdat.org/gem-109.html
https://www.alexandrite.net/chapters/chronology-on-the-history-of-alexandrite.html
https://www.researchgate.net/publication/233498637_Current_uses_of_alexandrite_laser_in_dermatology
https://www.mindat.org/min-4003.html
https://www.gia.edu/tourmaline-description
https://www.gia.edu/tourmaline-quality-factor
http://www.nordskip.com/usambara.html
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/42EFF429E7D75CD915330DB9F1137F89/S0026461X00001018a.pdf/div-class-title-usambara-effect-in-tourmaline-optical-spectroscopy-and-colourimetric-studies-div.pdf

Image Sources:
https://en.wikipedia.org/wiki/Diamond#/media/File:Diamond_structure.gif
https://commons.wikimedia.org/wiki/File:Several_corundum_crystals.jpg
https://en.wikipedia.org/wiki/File:Ruby_gem.JPG
https://en.wikipedia.org/wiki/File:Padparadscha_sapphire.jpg
https://commons.wikimedia.org/wiki/Category:Cordierite#/media/File:Cordierite_pl%C3%A9ochro%C3%AFsme.jpg
https://commons.wikimedia.org/wiki/File:Cordierite-den07-06aa.jpg
https://commons.wikimedia.org/wiki/File:Cordierite_-_bevellinged_with_necklace_-_view_on_blue-violet_a-axis.jpg
https://commons.wikimedia.org/wiki/File:Cordierite_-_bevellinged_with_necklace_-_view_on_colorless_b-axis.jpg
https://commons.wikimedia.org/wiki/File:Andalusite_Jewels.jpg
https://commons.wikimedia.org/wiki/Category:Andalusite#/media/File:Andalusite-RLKG083b.jpg
https://commons.wikimedia.org/wiki/File:Andalusite-RLKG083d.jpg

https://commons.wikimedia.org/wiki/File:Andalusite-RLKG083c.jpg
https://commons.wikimedia.org/wiki/File:Александрит_Камень.jpg
https://en.wikipedia.org/wiki/Alexander_II_of_Russia#/media/File:Zar_Alexander_II_(cropped).jpg
https://docs.google.com/document/d/1YumbGYgXMrL5GfA5mXbpcUS7Jo_lzfFLhU9NeYOz-5s/edit?pli=1
https://commons.wikimedia.org/w/index.php?sort=relevance&search=visible+light&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns0=1&ns6=1&ns12=1&ns14=1&ns100=1&ns106=1#/media/File:Linear_visible_spectrum.svg
https://commons.wikimedia.org/wiki/File:Tourmaline-121240.jpg
https://en.wikipedia.org/wiki/File:Elbaite_Nampula.jpg
https://commons.wikimedia.org/wiki/File:Fluorite-Foitite-Schorl-k-117a.jpg
https://commons.wikimedia.org/wiki/File:Elbaite-278491.jpg

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