http://earthwise.bgs.ac.uk/index.php?action=history&feed=atom&title=File%3AP527612.jpg 2026-04-03T19:49:24Z Revision history for this page on the wiki MediaWiki 1.42.3 http://earthwise.bgs.ac.uk/index.php?title=File:P527612.jpg&diff=31965&oldid=prev 2017-08-02T18:04:37Z

<p>User created page with UploadWizard</p> <p><b>New page</b></p><div>=={{int:filedesc}}==<br /> {{Information<br /> |description={{|1=A specimen of muscovite mica, with beryl, from Lochan an Resipol. British Geological Survey Petrology Collection sample number MC 7392. This locality, Beinn Resipol, was one of the six localities recommended for further investigation for commercial production of mica during the Second World War. After investigation it compared unfavourably with the deposit at Knoydart. Muscovite is a hydrous potassium aluminium silicate belonging to the phyllosilicates and was sought after commercially to replace mica from India. Beryl is another mineral, it is a beryllium aluminium silicate of the hexagonal crystal system. It is very hard, 7.5 to 8 on the Moh&#039;s scale of hardness. Beryl is also an economic mineral used as a source of beryllium and particularly as a gemstone. P527612.}}<br /> |date=2017-08-02 19:01:08<br /> |source=British Geological Survey<br /> |author=British Geological Survey<br /> |permission=<br /> |other versions=<br /> }}<br /> <br /> =={{int:license-header}}==<br /> {{subst:Custom license marker added by UW}}<br /> {{BGS}}<br /> <br /> [[Category:Uploaded with UploadWizard]]</div>

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