Hostname: page-component-848d4c4894-mwx4w Total loading time: 0 Render date: 2024-06-29T23:08:12.157Z Has data issue: false hasContentIssue false

On Idocrase and other Minerals recently found near Zermatt

Published online by Cambridge University Press:  14 March 2018

W. J. Lewis*
Affiliation:
University of Cambridge

Extract

Some Zermatt Guides (Joseph Taugwalder and his brother) made, on a recent excursion up one of the mountains (Pollux ?) in the neighbourhood, the discovery of some very interesting crystals of idocrase and red garnet.

The idocrase crystals are of a dark sherry eolour, and are developed in simple forms, the prism-planes m{110}, a{100}, and the base c{001}, being well developed. The edges [cm] are truncated by narrow planes u{111}, and at the corners small planes i{312} are sometimes found. The prism planes are deeply striated, and at the same time the c plane shows more or less coarse squares, which sometimes seem to belong to independent crystals. The sides of the square are parallel to the a {100} faces. The crystals have, therefore, much the character of a bundle of thin pyramidal crystals united together in parallel positions.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1886

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)