Minerals are naturally occurring INORGANIC substances that form the Earth's crust. The crossword solutions for the term mineral include INORGANIC (9 letters), QUARTZ (6 letters), TALC (4 letters), MICA (4 letters), ORE (3 letters), SPA (3 letters), SPAR (4 letters), URAO (4 letters), EMERY (5 letters), IOLITE (6 letters), NATRON (6 letters), EDENITE (7 letters), and FORTYFOURACROSS (15 letters). These minerals have a variety of uses, from industrial to decorative.