This document provides information about minerals, including their definition, characteristics, uses, and physical properties. It defines minerals as naturally occurring inorganic solids with a definite chemical composition and crystalline structure. Common minerals like talc, gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, corundum and diamonds are then described in terms of their chemical formulas, physical properties and common uses. The document concludes by covering physical properties of minerals such as color, streak, hardness, cleavage, crystalline structure, diaphaneity, luster, tenacity and sectility.