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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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