English

Iridescent color in peristerite

"Reprinted from American Mineralogist, vol.15, no.3, March, 1930"--title page. "Primarily on the material found near Hybla, Ontario but containing a useful review of previous work on the phenomena of peristerism in albite. Attributes color to reflections and interferences in twinning lamellae."-​-​Gemology by J. Sinkankas, entry no. 4994.

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