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Alexandrite

Tsarstone collectors guide


Alexandrite

Alexandrite
Named after Russian Tsar Alexander II. A highly dichroic, rare variety of chrysoberyl. Emerald green in natural daylight, reddish in violet by artificial light, due to its unusual absorption properties. One of the hardest and most important gemstones. A fine variety is the night stone. Iron-rich varieties are yellow, green and brown in color, and are inert under UV light or X-rays. Only alexandrite exhibits a weak, red luminescence under SWUV light. Synthetic alexandrites are produced by the Czochralski, the puling method, the flux process, and the floating-zone method.
Bibliographic details
Page title Definition of Alexandrite
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 03 July 2010 04:46 UTC
Date accessed 03 June 2026 16:07 UTC
Permanent link http://w.alexandrite.com/viewpage.html?id=GG-086-00002
AMA style
David Weinberg. "Definition of Alexandrite". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 04:46 UTC. Available at: http://w.alexandrite.com/viewpage.html?id=GG-086-00002. Accessed June 03, 2026.
APA style
"Definition of Alexandrite". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 16:07, June 03, 2026, from http://w.alexandrite.com/viewpage.html?id=GG-086-00002.
Bluebook style
"Definition of Alexandrite", http://w.alexandrite.com/viewpage.html?id=GG-086-00002 (last visited June 03, 2026).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "Definition of Alexandrite", http://w.alexandrite.com/viewpage.html?id=GG-086-00002 (Named after Russian Tsar Alexander II. A highly dichroic, rare variety of chrysoberyl. Emerald green in natural daylight, reddish in violet by artificial light, due to its unusual absorption properties. One of the hardest and most important gemstones. A fine variety is the night stone. Iron-rich varieties are yellow, green and brown in color, and are inert under UV light or X-rays. Only alexandrite exhibits a weak, red luminescence under SWUV light. Synthetic alexandrites are produced by the Czochralski, the puling method, the flux process, and the floating-zone method.) (as of Jun. 03, 2026, 16:07 GMT).
CBE/CSE style
David Weinberg. "Definition of Alexandrite". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 04:46 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 04:46 UTC [cited 2026 Jun 03]. Available from: http://w.alexandrite.com/viewpage.html?id=GG-086-00002.
Chicago style
David Weinberg, "Definition of Alexandrite", http://w.alexandrite.com/viewpage.html?id=GG-086-00002, (accessed June 03, 2026).
MLA style
"Definition of Alexandrite". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 04:46 UTC. 03 Jun 2026 http://w.alexandrite.com/viewpage.html?id=GG-086-00002
MHRA style
David Weinberg, "Definition of Alexandrite", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 04:46 UTC, http://w.alexandrite.com/viewpage.html?id=GG-086-00002 [accessed 03 June 2026].
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