Definition: The word "petrography" is an optical or physical term that refers to the study of minerals and their properties through the use of a microscope. It typically involves analyzing samples of rock, soil, ore, or other material in order to determine its chemical composition and structure. "The word 'petrographic(al)'," which seems to be a typo, refers to the process of observing the physical characteristics of rocks and minerals with an optical microscope. This term is often used in the field of mineralogy, where it is used to describe methods used for analyzing the properties of rocks such as their mineral content, texture, color, and crystal structure. In summary, "petrography" refers to the study of minerals using a microscope; while "petrographic(al)" refers to the process of observing these physical characteristics with an optical microscope.
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