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Color in feldspars

Hofmeister, A. M. and Rossman, G. R. (1983) Color in feldspars. In: Feldspar mineralogy. Reviews in mineralogy. No.2. Mineralogical Society of America , Washington, DC, pp. 271-280. ISBN 9780939950140.

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Pure feldspar, free of exsolution, is colorless. However, minor chemical substituents, inclusions, interference effects from exsolution lamellae, and radiation damage can produce color in the mineral. Chemical impurities produce the yellow color of sanidine, orthoclase and calcic plagioclase, the blue to green colors of amazonite, and the blue-green color of sodic plagioclase. Inclusions create a wide variety of colors: pink, brick-red, and grays are common; orange, tan and green may also occur. Aventurine and shiller effects also result from inclusions. Radiation produces gray or smoky colors. Exsolution phenomena and oriented intergrowths produce interference colors, schiller and chatoyancy. This chapter describes the colored varieties of feldspar and their absorption spectra and coloration mechanisms. Labradorescence and moonstone effects, which are produced by interference phenomena and scattering phenomena, were discussed in Chapter 10.

Item Type:Book Section
Rossman, G. R.0000-0002-4571-6884
Additional Information:© 1983 Mineralogical Society of America.
Series Name:Reviews in mineralogy
Issue or Number:2
Record Number:CaltechAUTHORS:20130716-133040693
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39396
Deposited By: Tony Diaz
Deposited On:20 Sep 2013 23:27
Last Modified:26 Nov 2019 11:15

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