Petrology is a field of geology, which focuses on the study of rocks and the conditions by which they form. There are three branches of petrology corresponding to the three types of rocks, the igneous, metamorphic and sedimentary. The word petrology comes from a Greek word meaning rock. The word lithology once approximately synonymous with […]

Petrographic microscope, also called a polarizing microscope, is best described as a compound transmitted light microscope to which components have been added to enable the determination of the optical properties of translucent substances. The designation of the microscope as a compound microscope indicates that it has an ocular that focuses on a virtual picture of […]