chrysoberyl

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chrysoberyl

chrysoberyl [Gr.,=golden beryl], a beryllium aluminate used as a gem. It has a vitreous luster and is transparent to translucent. The more valuable cat's-eye is a variety of chrysoberyl. Another variety, alexandrite, was first discovered in the Ural Mts. of Russia, on the birthday of Czar Alexander II, for whom it was named. It is remarkable in that it is green by daylight and raspberry red under artificial light. It was popular in imperial Russia, both because of its association with the czar and because red and green were the colors of the empire. It is now found chiefly in Sri Lanka and Brazil.

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"chrysoberyl." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 23 Nov. 2009 <http://www.encyclopedia.com>.

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chrysoberyl

A Dictionary of Earth Sciences | 1999 | | Â© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

chrysoberyl Mineral, BeAl₂O₄; sp. gr. 3.5–3.8; hardness 8.5; orthorhombic; various shades of green or greenish-yellow; white streak; vitreous lustre; crystal form tabular; cleavage prismatic {110}; occurs in granites, pegmatites, and mica schists, also in alluvial sands and gravels. The emerald-green variety is used as a gemstone (alexandrite).

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AILSA ALLABY and MICHAEL ALLABY. "chrysoberyl." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 23 Nov. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "chrysoberyl." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (November 23, 2009). http://www.encyclopedia.com/doc/1O13-chrysoberyl.html

AILSA ALLABY and MICHAEL ALLABY. "chrysoberyl." A Dictionary of Earth Sciences. 1999. Retrieved November 23, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-chrysoberyl.html

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cats-eye

The Oxford Pocket Dictionary of Current English | 2009 | © The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information) Copyright

cat's-eye • n. a semiprecious stone, esp. chalcedony or chrysoberyl, with a chatoyant luster.

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"cat's-eye." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 23 Nov. 2009 <http://www.encyclopedia.com>.

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A Dictionary of Earth Sciences entry for alexandrite

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Index 2005 Volume 80.
Magazine article from: Rocks & Minerals; 1/1/2006

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	Jewel of the month.(chrysoberyl cat's-eye) Magazine article from: Jewelers Circular Keystone; 7/1/2003; ; 700+ words ; CHRYSOBERYL CAT'S-EYE Featuring straight and...transparent golden-yellow color, these chrysoberyl cat's-eyes are all courtesy of Jeffrey...most prized of all cat's-eyes, the chrysoberyl car's-eye. Of all the natural gem...
	New crystallography study findings have been reported from Hanyang University. Newspaper article from: Journal of Technology; 9/29/2009; 676 words ; ...Proton beam irradiated chrysoberyls," wrote Y.K. Ahn and...Natural non-irradiated chrysoberyls D-cr = 2.2 x 10(-3...electron beam irradiated chrysoberyls." Ahn and colleagues published...Diffusion of chromium in chrysoberyl. Journal of Crystal Growth...
	Thai Gem treaters dispute labs. (Gem Notes).(Brief Article) Magazine article from: Jewelers Circular Keystone; 8/1/2002; ; 700+ words ; ...Madagascar sapphires in the presence of chrysoberyl (BeAIO4). It's believed that...beryllium and other elements from the chrysoberyl enter the sapphire and react with...Chanthaburi heat-treaters, chrysoberyl alone cannot change the color...
	Mineralogy of dumortierite-bearing abyssal pegmatites at Starkoc and Bestvina, Kutná Hora Crystalline Complex Magazine article from: Journal of the Czech Geological Society; 1/1/2006; ; 700+ words ; ...III + tourmaline I + dumortierite I + chrysoberyl; (ii) Prograde metamorphic assemblage...kyanite, whereas only trace amounts of chrysoberyl, staurolite and several very rare accessory...prismatine, boralsilite, werdingite, chrysoberyl, sapphirine, taaffeite and musgravite...
	THROWING LIGHT ON RARE MINERALS Newspaper article from: The Record (Bergen County, NJ); 9/29/1995; ; 700+ words ; ...it. The "Camelot," a chrysoberyl engraved with a bald eagle...photographer, and owner of a chrysoberyl gem mine in Brazil, where...Animal Magnetism, a dozen chrysoberyl cat's-eyes mimicking...Matadors, a suite of seven red chrysoberyls, also will be on display...
	Emerald and associated minerals from A Franqueira, Pontevedra, Spain Magazine article from: Mineralogical Record; 11/1/1997; ; 700+ words ; ...minerals include phenakite crystals and chrysoberyl crystals and twins, some showing the...depending upon illumination source suggested chrysoberyl, an identification confirmed by X...appears. In zones nearest the contact, chrysoberyl, phenakite and beryl formed. Chromium...
	Madagascar sapphire. (Jewel of the Month). Magazine article from: Jewelers Circular Keystone; 11/1/2002; ; 700+ words ; ...was hear-treated with yellow chrysoberyl rough (which had been mistaken for sapphire), beryllium from the chrysoberyl migrated into the sapphire, creating...were hear-treated along with chrysoberyl rough to produce better, more...
	STATUS OF GEMSTONE RESOURCES IN INDIA News Wire article from: The Hindustan Times; 6/9/2007; 700+ words ; ...aluminium oxide), emerald, aquamarine and chrysoberyl (all are beryllium aluminium silicate...beryl has another gem variety known as chrysoberyl or cat's eye. In Sanskrit, it is...pseudo-hexagonal twins. In India, chrysoberyl is located at Kaugayam in Coimbatore...
	BOOKS IN BRIEF: Experience in Public Education Speaks Newspaper article from: Polish-American Journal; 2/1/2001; ; 700+ words ; ...Tor Books, 2000 384 pp., $24.95 Chrysoberyl lives in a future universe and struggles...improve her thoughts. By peering through Chrysoberyl's eyes, they boost her brain power. But Chrysoberyl has fears of these microbes taking over...
	Smithsonian provides fascinating collection of diamonds and gemstones. Magazine article from: Israel Diamonds; 2/1/2009; ; 700+ words ; ...in pegmatite, such as feldspars, smoky and rose quartz, chrysoberyl, beryl, tourmaline, apatite, spodumene and topaz, are...from Burma and the 58.2-carat "Maharani" cat's eye chrysoberyl. Iridescent feldspars gems, including moonstones, sunstones...