A complex diagenetic history can be studied by optical mineralogy, using a petrographic microscope. Multidisciplinary researches engage archaeometric, lipid, petrographic, and isotopic analyses. The minerals in Portland cement clinker may be observed and quantified by petrographic microscopy. Macerals are observed under the petrographic microscope under reflected light. Norite may be essentially indistinguishable from gabbro without thin section study under the petrographic microscope. It is a unique type of petrographic geomorphology found in China. A textural indicator can be observed in petrographic thin sections. It would be glued to a slide and placed under a petrographic microscope for examination. However, the most important tool for the petrographer is the petrographic microscope. The classification of rocks is based on the information acquired during the petrographic analysis. This project consisted of analyzing artifacts with chemicals and other petrographic methods. The two formations can also be distinguished by petrographic and sedimentologic differences. W. H. Twelvetrees and W. F. Petterd did petrographic investigations in Cygnet, around 1899. A poikilitic texture is most easily observed in petrographic thin sections. In addition, numerous petrographic carvings have been found.