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Re: Volcanite



Volcanite, the mineral, is an old mineral name used as a synonym
of pyroxene and a variety of sulfur containing less than one percent
selenium.

Volcanite, the rock, is an extrusive rock composed chiefly of 
anorthoclase, andesine and augite phenochrysts in a glassy 
groundmass containing feldspar and augite microlites.

I assume Volcanit is a trade name.

VR,
Frank


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