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AMA style

David Weinberg. "Definition of Zoning". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 04:52 UTC. Available at: http://w.alexandrite.com/viewpage.html?id=GG-085-00005. Accessed April 06, 2026.

APA style

"Definition of Zoning". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 15:33, April 06, 2026, from http://w.alexandrite.com/viewpage.html?id=GG-085-00005.

Bluebook style

"Definition of Zoning", http://w.alexandrite.com/viewpage.html?id=GG-085-00005 (last visited April 06, 2026).

Bluebook: Harvard JOLT style

See Alexandrite Tsarstone Collectors Guide, "Definition of Zoning", http://w.alexandrite.com/viewpage.html?id=GG-085-00005 (The straight, parallel growth-lines in the internal structure of a gemstone with definite angles, usually seen in some stones, which occur by slightly variation in the chemical composition within the crystal due to separation or interruptions of the crystal phases during growth. in points.) (as of Apr. 06, 2026, 15:33 GMT).

CBE/CSE style

David Weinberg. "Definition of Zoning". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 04:52 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 04:52 UTC [cited 2026 Apr 06]. Available from: http://w.alexandrite.com/viewpage.html?id=GG-085-00005.

Chicago style

David Weinberg, "Definition of Zoning", http://w.alexandrite.com/viewpage.html?id=GG-085-00005, (accessed April 06, 2026).

MLA style

"Definition of Zoning". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 04:52 UTC. 06 Apr 2026 http://w.alexandrite.com/viewpage.html?id=GG-085-00005

MHRA style

David Weinberg, "Definition of Zoning", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 04:52 UTC, http://w.alexandrite.com/viewpage.html?id=GG-085-00005 [accessed 06 April 2026].