Nosean
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Nosean, also known as Noselite, is a mineral of the feldspathoid group with formula:Na8Al6Si6O24(SO4). It forms isometric crystals of variable color: white, grey, blue, green, to brown. It has a Mohs hardness of 5.5 to 6 and a specific gravity of 2.3 to 2.4. It is fluorescent. It is found in low silica igneous rocks.
It was first described in 1815 from th Rhineland in Germany and named after the German mineralogist K. W. Nose (1753-1835).
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