Feldspar

Etymology
Feld, field (from Middle High German veld, from Old High German feld) + Spath, spar

Alternative forms

 * felspar

Noun

 * 1)  Any of 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.

Related terms

 * feldspathic

Derived terms

 * feldsparlike

Translations

 * Czech: živec
 * Esperanto:
 * Finnish:


 * Icelandic:
 * Italian:
 * Spanish: