Fassaite is a variety of augite with a very low iron content, Ca(Mg,Fe,Al)(Si,Al)2O6. It is named after the Fassa Valley, Italy. It is thought to be a contact mineral formed at high temperature on the interface between volcanic rocks and limestone. It is also reported in meteorites. ...
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http://en.wikipedia.org/wiki/Fassaite
• (n.) A variety of pyroxene, from the valley of Fassa, in the Tyrol.
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http://thinkexist.com/dictionary/meaning/fassaite/
Fas'sa·ite noun (Min.) A variety of pyroxene, from the valley of
Fassa , in the Tyrol.
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http://www.encyclo.co.uk/webster/F/10
Fassaite, named after the Fassa valley in the Tyrol, is a variety of pyroxene.
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http://www.probertencyclopaedia.com/browse/HF.HTM
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