The best name is feldspar. If you’re naming a made up rock, using a made up name, my daughter once named a made up virus Fred. read more
The name feldspar derives from the German Feldspat, a compound of the words Feld, "field", and Spat, "a rock that does not contain ore". The change from Spat to -spar was influenced by the English word spar, meaning a non-opaque mineral with good cleavage. read more