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Alexandrite

Tsarstone collectors guide


Inclusions

Inclusions
A general name for any small visible foreign matter such as gas, liquid, glass, or mineral enclosed within a gemstone or rock, which is a growth phenomena. Fracture or cleavage in a gemstone are not classed as inclusions. The nature of inclusions are used to indicate the origin of a stone. Inclusions are very helpful in distinguishing synthetic stones from their counterparts. Inclusions are divided into two categories: (I) primary inclusions and (II) secondary inclusions. Inclusions may result in three formations: (a) pre-temporary inclusions, pre-existing inclusions, or photogenetic inclusions, (b) contemporary inclusions, or syngenetic inclusions and (c) post-temporary inclusions, post-formed inclusions, or epigenetic inclusions. Some types of inclusions type are: feather, silk, horsetail, veil, fused or treacle, negative crystal, halo, fingerprint, dendrite, centipede, pleochroic halo, zircon halo, two-phase, three-phase, etc. Inclusions are divided in four shapes: (a) solid inclusions, (b) internal cavities, (c) cracks or fissures, and (d) growths.
Bibliographic details
Page title Definition of Inclusions
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 03 July 2010 04:46 UTC
Date accessed 21 May 2026 17:54 UTC
Permanent link http://m.alexandrite.net/viewpage.html?id=GG-094-00005
AMA style
David Weinberg. "Definition of Inclusions". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 04:46 UTC. Available at: http://m.alexandrite.net/viewpage.html?id=GG-094-00005. Accessed May 21, 2026.
APA style
"Definition of Inclusions". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 17:54, May 21, 2026, from http://m.alexandrite.net/viewpage.html?id=GG-094-00005.
Bluebook style
"Definition of Inclusions", http://m.alexandrite.net/viewpage.html?id=GG-094-00005 (last visited May 21, 2026).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "Definition of Inclusions", http://m.alexandrite.net/viewpage.html?id=GG-094-00005 (A general name for any small visible foreign matter such as gas, liquid, glass, or mineral enclosed within a gemstone or rock, which is a growth phenomena. Fracture or cleavage in a gemstone are not classed as inclusions. The nature of inclusions are used to indicate the origin of a stone. Inclusions are very helpful in distinguishing synthetic stones from their counterparts. Inclusions are divided into two categories: (I) primary inclusions and (II) secondary inclusions. Inclusions may result in three formations: (a) pre-temporary inclusions, pre-existing inclusions, or photogenetic inclusions, (b) contemporary inclusions, or syngenetic inclusions and (c) post-temporary inclusions, post-formed inclusions, or epigenetic inclusions. Some types of inclusions type are: feather, silk, horsetail, veil, fused or treacle, negative crystal, halo, fingerprint, dendrite, centipede, pleochroic halo, zircon halo, two-phase, three-phase, etc. Inclusions are divided in four shapes: (a) solid inclusions, (b) internal cavities, (c) cracks or fissures, and (d) growths.) (as of May. 21, 2026, 17:54 GMT).
CBE/CSE style
David Weinberg. "Definition of Inclusions". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 04:46 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 04:46 UTC [cited 2026 May 21]. Available from: http://m.alexandrite.net/viewpage.html?id=GG-094-00005.
Chicago style
David Weinberg, "Definition of Inclusions", http://m.alexandrite.net/viewpage.html?id=GG-094-00005, (accessed May 21, 2026).
MLA style
"Definition of Inclusions". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 04:46 UTC. 21 May 2026 http://m.alexandrite.net/viewpage.html?id=GG-094-00005
MHRA style
David Weinberg, "Definition of Inclusions", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 04:46 UTC, http://m.alexandrite.net/viewpage.html?id=GG-094-00005 [accessed 21 May 2026].
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