|Sunday, September 20, 2009||91D||Mineral that crystallizes from magma||Michael Ashley|
|Sunday, January 25, 2004||38A||Important constituent of igneous rocks||Harvey Estes and Nancy Salomon|
|Wednesday, May 27, 1998||25A||Igneous rock constituent||Mark Elliot Skolsky|
|Thursday, September 18, 1997||10D||Crystalline mineral||Cathy Millhauser|
1 result for FELDSPAR from older pre-Shortz puzzles.
|Monday, December 28, 1992||29A||Rock-forming mineral||Jeff Herrington||Maleska|