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Glossary of Minerals Terms
beginning with letter F
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feldspar Tweet Definition of feldspar Like Definition of feldspar on Facebook
noun 
  1. (mineralogy) A large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks.
     
feldspathic Tweet Definition of feldspathic Like Definition of feldspathic on Facebook
adjective 
  1. (mineralogy) Containing feldspar.
     
fluor Tweet Definition of fluor Like Definition of fluor on Facebook
noun 
  1. fluorite, Fluorite.
     
fluoric Tweet Definition of fluoric Like Definition of fluoric on Facebook
adjective 
  1. (chemistry) Pertaining to, obtained from or containing fluorine.
     
fluorite Tweet Definition of fluorite Like Definition of fluorite on Facebook
noun 
  1. a widely occuring mineral, (calcium fluoride), of various colours, used as a flux in steelmaking, and in the manufacture of glass, enamels and hydrofluoric acid
     
fool's gold Tweet Definition of fool Like Definition of fool
noun (-, sg=fool's gold)
  1. A mineral or other substance often mistaken for gold, mainly used for iron pyrite.
     

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