Adamantine • Becomes • Changes • Chemical • Civilization • Color • Crystal • Cubic • Decorative • Dissolves • Distinctive • Due • Exposed • Fe₂o₃ • Fes₂ • Form • Formation • Formed • Formula • Found • Galena • Gold • Greeks • Hexagonal • Lighting • Magneti • Mayans • Mine • Mistaken • Mohs • Most • Naturally • Needle • Odor • Orthorhombic • Over • Paint • Pearly • Production • Rock • Similar • Stone • Structure • Sulfide • Sulfur • Their • Under • Use • Water • When