al·ex·an·drite

(ăl′ĭg-zăn′drīt′)

A greenish chrysoberyl that appears red in artificial light, used as a gemstone.

[German Alexandrit, after Alexander I.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

alexandrite

(ˌælɪɡˈzændraɪt)

(Minerals) a green variety of chrysoberyl used as a gemstone

[C19: named after Alexander I (1777–1825), tsar of Russia (1801–25); see -ite¹]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

al•ex•an•drite

(ˌæl ɪgˈzæn draɪt, -ˈzɑn-)

n.

a variety of chrysoberyl, green by daylight and red-violet by artificial light, used as a gem.

[1830–40; after Alexander I of Russia; see -ite¹]

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

alexandrite - a green variety of chrysoberyl used as a gemstone

chrysoberyl - a rare hard yellow green mineral consisting of beryllium aluminate in crystal form; used as a gemstone

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References in periodicals archive

Category one includes gemstones such as diamonds, sapphire, emerald, black opal, demantuit, alexandrite, chrysoberyl and all artificial gemstones made in modern ways.

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[USPRwire, Wed Jan 02 2019] The increasing significance given to aesthetics and beauty in the modernized and changing lifestyles is providing a boost to the Alexandrite laser treatment Market The major enhancements with the use of alexandrite laser treatment help cater to the needs of consumers.

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In order to reach stem cells in the hair follicle, you can't use superficial wavelengths, so we end up using the 755-nm alexandrite laser, 810-nm diode laser, or the 1,064-nm long-pulsed Nd:YAG laser for the most part in order to get our result.

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Q-switched lasers include the Q-switched ruby laser (694 nm), Q-switched neodymium-doped yttrium-aluminum-garnet (Nd:YAG) (532 nm and 1 064 nm) and Q-switched alexandrite laser (755 nm).

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There are three types of laser used for hair removal: Alexandrite, Diode and ND-Yag Cairo-based dermatologist Dr.

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There are also diamonds, sapphires, rubies, emeralds, natural pearls and coral and collector's gemstones, among which are a Paraiba tourmaline (lot 1184) with a crystalline colour and an alexandrite weighing 11.63 carats (lot 1132).

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