foyaite

English

Etymology

From Foya +‎ -ite, after the part of Portugal where they can be found.

Noun

foyaite (countable and uncountable, plural foyaites)

  1. (mineralogy) A K-feldspar-nepheline syenite mineral containing a proportion of ferromagnesian minerals, usually pyroxene, hornblende, and biotite.

Derived terms

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