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An investigation of nephrite jade by electron microscopy

Published online by Cambridge University Press:  05 July 2018

M. Dorling  and
J. Zussman
M. Dorling
Affiliation:
Department of Geology, University of Manchester, Manchester M13 9PL
J. Zussman
Affiliation:
Department of Geology, University of Manchester, Manchester M13 9PL
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Abstract

Two specimens of tremolite and one of richterite, all with nephrite jade texture, have been examined by transmission electron microscopy using ion-thinning for specimen preparation. The specimens contain clusters of very small lath-like crystallites with z-axes approximately parallel but in a range of azimuthal orientations. It is suggested that these clusters which are themselves in varied orientations are the result of post-tectonic recrystallization of strained amphibole crystals, the new crystals inheriting the z-axis orientations of the old. The extreme toughness of nephrite jade is attributed to a number of the sub-microscopic features observed, including the sizes, habits, and orientations of its crystallites, and the nature of its grain boundaries.

Keywords

electron microscopynephrite jadetremoliterichterite
Type
Research Article
Information
Mineralogical Magazine , Volume 49 , Issue 350 , March 1985 , pp. 31 - 36
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985 

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