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Alexandrite

Tsarstone collectors guide


Silica

Silica
Dioxide of silicon (SiO2), which appeared in five crystalline polymorphous such as quartz (alpha and beta), tridymite, cristobalite, coesite, and stichovite, in cryptocrystalline such as chalcedony and chert, and in amorphous such as opal (a hydrated silica) and lechatelierite. It is an essential constituent of silicate group of rock forming minerals. It occurs in sand, diatomite, tripoli, flint, chert, etc. Important minerals yield as several gem varieties. Also it is basis form of most glasses and used as an abrasive, to ceramic, etc.
Bibliographic details
Page title Definition of Silica
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 03 July 2010 05:45 UTC
Date accessed 16 April 2014 13:08 UTC
Permanent link http://www.alexandrite.net/viewpage.html?id=GG-104-00001
AMA style
David Weinberg. "Definition of Silica". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 05:45 UTC. Available at: http://www.alexandrite.net/viewpage.html?id=GG-104-00001. Accessed April 16, 2014.
APA style
"Definition of Silica". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 13:08, April 16, 2014, from http://www.alexandrite.net/viewpage.html?id=GG-104-00001.
Bluebook style
"Definition of Silica", http://www.alexandrite.net/viewpage.html?id=GG-104-00001 (last visited April 16, 2014).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "Definition of Silica", http://www.alexandrite.net/viewpage.html?id=GG-104-00001 (Dioxide of silicon (SiO2), which appeared in five crystalline polymorphous such as quartz (alpha and beta), tridymite, cristobalite, coesite, and stichovite, in cryptocrystalline such as chalcedony and chert, and in amorphous such as opal (a hydrated silica) and lechatelierite. It is an essential constituent of silicate group of rock forming minerals. It occurs in sand, diatomite, tripoli, flint, chert, etc. Important minerals yield as several gem varieties. Also it is basis form of most glasses and used as an abrasive, to ceramic, etc.) (as of Apr. 16, 2014, 13:08 GMT).
CBE/CSE style
David Weinberg. "Definition of Silica". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 05:45 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 05:45 UTC [cited 2014 Apr 16]. Available from: http://www.alexandrite.net/viewpage.html?id=GG-104-00001.
Chicago style
David Weinberg, "Definition of Silica", http://www.alexandrite.net/viewpage.html?id=GG-104-00001, (accessed April 16, 2014).
MLA style
"Definition of Silica". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 05:45 UTC. 16 Apr 2014 http://www.alexandrite.net/viewpage.html?id=GG-104-00001
MHRA style
David Weinberg, "Definition of Silica", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 05:45 UTC, http://www.alexandrite.net/viewpage.html?id=GG-104-00001 [accessed 16 April 2014].
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