Petrographical Microscope

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An illustration of a petrographical microscope. A petrographic microscope is a type of optical microscope used in petrology and optical mineralogy to identify rocks and minerals in thin sections. The microscope is used in optical mineralogy and petrography, a branch of petrology which focuses on detailed descriptions of rocks.


The Century Dictionary and Cyclopedia (New York, NY: The Century Co., 1889)


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