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Alexandrite

Tsarstone collectors guide

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Causes of color change in malaia and color changing garnets on Apr 9 2009, at 08:55 in Colour change garnet
Malaia is name given to garnets orange to pinkish orange to red in color which do not match the color and gemological properties of any of the other more well known varieties of garnet. (Some authors spell it Malaya garnet).

malaya_zmg120ac.jpg

Indeed, the word malaia means prostitute or out of the family in Swahili. Primarily composed of spessartite
and pyrope, the color and gemological properties occur in a range which can overlap with grossularite, rhodolite, and pyrope.

spessartite_yse246aa.jpg

Some of them may change color under daylight and incandescent lighting and these stones are more commonly and collectively known as Color Change Garnets. It is thought that the color change is due to the presence of vanadium or chromium in trace amounts. Our own observations indicate that color change could also be influenced by the needle like inclusions of rutile or actinolite which are common in the color changing stones but less apparent in the stones that don’t change color.

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Bibliographic details
Page title Causes of color change in malaia and color changing garnets
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 09 April 2009 08:55 UTC
Date accessed 24 November 2014 01:11 UTC
Permanent link http://www.alexandrite.net/viewpage.html?id=FRM-342-00003
AMA style
David Weinberg. "Causes of color change in malaia and color changing garnets". In Alexandrite Tsarstone Collectors Guide. April 09, 2009, 08:55 UTC. Available at: http://www.alexandrite.net/viewpage.html?id=FRM-342-00003. Accessed November 24, 2014.
APA style
"Causes of color change in malaia and color changing garnets". (2009, April 09). In Alexandrite Tsarstone Collectors Guide. Retrieved 01:11, November 24, 2014, from http://www.alexandrite.net/viewpage.html?id=FRM-342-00003.
Bluebook style
"Causes of color change in malaia and color changing garnets", http://www.alexandrite.net/viewpage.html?id=FRM-342-00003 (last visited November 24, 2014).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "Causes of color change in malaia and color changing garnets", http://www.alexandrite.net/viewpage.html?id=FRM-342-00003 (Garnet color change could also be influenced by the needle like inclusions of rutile or actinolite) (as of Nov. 24, 2014, 01:11 GMT).
CBE/CSE style
David Weinberg. "Causes of color change in malaia and color changing garnets". In Alexandrite Tsarstone Collectors Guide. 2009 Apr 09, 08:55 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2009 Apr 09, 08:55 UTC [cited 2014 Nov 24]. Available from: http://www.alexandrite.net/viewpage.html?id=FRM-342-00003.
Chicago style
David Weinberg, "Causes of color change in malaia and color changing garnets", http://www.alexandrite.net/viewpage.html?id=FRM-342-00003, (accessed November 24, 2014).
MLA style
"Causes of color change in malaia and color changing garnets". Alexandrite Tsarstone Collectors Guide. 09 Apr 2009, 08:55 UTC. 24 Nov 2014 http://www.alexandrite.net/viewpage.html?id=FRM-342-00003
MHRA style
David Weinberg, "Causes of color change in malaia and color changing garnets", Alexandrite Tsarstone Collectors Guide, 09 April 2009, 08:55 UTC, http://www.alexandrite.net/viewpage.html?id=FRM-342-00003 [accessed 24 November 2014].
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