foyaite
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English[edit]
Etymology[edit]
Foya + -ite, after the part of Portugal where they can be found.
Noun[edit]
foyaite (countable and uncountable, plural foyaites)
- (mineralogy) A K-feldspar-nepheline syenite mineral containing a proportion of ferromagnesian minerals, usually pyroxene, hornblende, and biotite.