Good quality alexandrite is teal, emerald, or blue-green under natural daylight or fluorescent lighting that ideally changes to purple-red or red under regular incandescent light.
The Alexandrite Gemstone Encyclopedia excelled in all areas of the international competition's judging criteria, earning an overall score of 488 out of 500.
David Weinberg.
"Discussion".
In Alexandrite Tsarstone Collectors Guide. August 12, 2011, 01:18 UTC.
Available at: http://w.alexandrite.com/viewpage.html?id=WRC-044.
Accessed June 18, 2026.
APA style
"Discussion".
(2011, August 12). In Alexandrite Tsarstone Collectors Guide. Retrieved 20:30, June 18, 2026, from http://w.alexandrite.com/viewpage.html?id=WRC-044.
Bluebook style
"Discussion", http://w.alexandrite.com/viewpage.html?id=WRC-044 (last visited June 18, 2026).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "Discussion", http://w.alexandrite.com/viewpage.html?id=WRC-044 (Discussion) (as of Jun. 18, 2026, 20:30 GMT).
CBE/CSE style
David Weinberg. "Discussion".
In Alexandrite Tsarstone Collectors Guide. 2011 Aug 12, 01:18 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2011 Aug 12, 01:18 UTC [cited 2026 Jun 18]. Available from: http://w.alexandrite.com/viewpage.html?id=WRC-044.
Chicago style
David Weinberg, "Discussion", http://w.alexandrite.com/viewpage.html?id=WRC-044, (accessed June 18, 2026).
MLA style
"Discussion". Alexandrite Tsarstone Collectors Guide. 12 Aug 2011, 01:18 UTC. 18 Jun 2026 http://w.alexandrite.com/viewpage.html?id=WRC-044
MHRA style
David Weinberg, "Discussion", Alexandrite Tsarstone Collectors Guide, 12 August 2011, 01:18 UTC, http://w.alexandrite.com/viewpage.html?id=WRC-044 [accessed 18 June 2026].