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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 04:45 UTC
Date accessed 31 October 2014 22:00 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, 04:45 UTC. Available at: http://www.alexandrite.net/viewpage.html?id=GG-104-00001. Accessed October 31, 2014.
APA style
"Definition of Silica". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 22:00, October 31, 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 October 31, 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 Oct. 31, 2014, 22:00 GMT).
CBE/CSE style
David Weinberg. "Definition of Silica". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 04:45 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 04:45 UTC [cited 2014 Oct 31]. 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 October 31, 2014).
MLA style
"Definition of Silica". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 04:45 UTC. 31 Oct 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, 04:45 UTC, http://www.alexandrite.net/viewpage.html?id=GG-104-00001 [accessed 31 October 2014].
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