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A simple method of observing the magnetic properties of mineral grains

Published online by Cambridge University Press:  14 March 2018

Frank Smithson
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Extract

In examining mineral grains either from sands or from crushed rocks it is frequently found that the electromagnet not only affords a means of separating certain minerals, but is also an aid to their identification. Yet an electromagnetic separation is rarely, if ever, complete, and minerals are frequently found to stray into fractions to which they do not rightly belong. As a result, a grain which, let us say, is found in the garnet fraction may be practically nonmagnetic, and if we assume that its magnetic properties are similar to those of garnet, a misidentification may be made. It seems desirable, therefore, that there should be some means of testing the magnetic properties of a single grain.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 22 , Issue 131 , December 1930 , pp. 419 - 421
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1930

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