IX. Preliminary Notice of substances which may prove to be New Minerals
- 1 September 1880
- journal article
- Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society
- Vol. 4 (18) , 117-123
- https://doi.org/10.1180/minmag.1880.004.18.04
Abstract
I give this name to a substance which may be regarded as of the nature of a hydrated magnesian felspar.It was found by Mr. Dudgeon and myself in granular limestone, about one third of a mile above and north-east of the hamlet of Balvraid; this hamlet is situated six miles up the Glen Beg of Glen Elg, Inverness-shire.Only a single large mass containing the mineral was found. In this mass it was associated with blue necronite (orthoclase of limestones), Biotite, and a hydrated labradorite.Its colour is purplish brown of a pale cast; its structure is crystalline granular, it may be called saccharoid; its hardness is 6; its specific gravity from 2·905 to 2·908Keywords
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