Explanation of the Colour Change in Alexandrites View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2020-04-09

AUTHORS

Fei Xie, Yu Cao, Cindy Ranchon, Alan Hart, Robin Hansen, Jeffrey E. Post, Coralyn W. Whitney, Emma Dawson-Tarr, Alan J. Drew, David J. Dunstan

ABSTRACT

Alexandrites are remarkable and rare gemstones. They display an extraordinary colour change according to the ambient lighting, from emerald green in daylight to ruby red in incandescent light from tungsten lamps or candles. While this colour change has been correctly attributed to chromium impurities and their absorption band in the yellow region of the visible light spectrum, no adequate explanation of the mechanism has been given. Here, the alexandrite effect is fully explained by considering the von Kries model of the human colour constancy mechanism. This implies that our colour constancy mechanism is real (objective) and primarily attuned to correct for the colour temperature of black-body illuminants. More... »

PAGES

6130

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-020-62707-3

DOI

http://dx.doi.org/10.1038/s41598-020-62707-3

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1126388583

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/32273534


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