Definitions for fassaite
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a variety of pyroxene, from the valley of Fassa, in the Tyrol
Fassaite is a variety of augite with a very low iron content, Ca(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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