See preview! All about minerals! 89 slide PowerPoint. 2 PowerPoints in 1! The first PowerPoint introduces minerals with a format geared towards grades 7-9. The second PowerPoint introduces minerals with a format geared towards grades 5-7 or higher grades with a lower ability student body. Topics include the following: definition of a mineral, mineral identification (color, streak, luster, hardness, cleavage, other properties), the most common minerals (quartz, orthoclase feldspar, plagioc