1. feldspar

noun. ['ˈfɛldˌspɑːr'] any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium.


  • silicon
  • plagioclase
  • Si
  • oligoclase
  • atomic number 14
  • moonstone
  • felspar
  • spar

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Words that Rhyme with Feldspar

  • caspar
  • fluorspar
  • fluorspar

Example sentences of the word feldspar

1. Noun, singular or mass
Arkose is a form of sand high in feldspar and granite.

2. Verb, non-3rd person singular present
For example, hydrolysis changes feldspar into clay.

3. Adjective
Turquoise, lapis lazuli and feldspar symbolized good luck, while amethysts represented happiness.