Someone who studies petrography is called a petrographer. Expert in petrography, mineralogy and crystallography, her research focused on geomorphology. In this position he penned many scientific articles on geology, petrography, zoology and botany. He is considered one of the pioneers of petrography in the United States. His scientific work concentrated mainly on sedimentology and petrography. The minerals in the rock have a characteristic pattern, using a method known as petrography. He was also professor of petrography at the University of Vienna. Based on petrography and whole-rock geochemistry, the BHH pipes are classed as Group 1A kimberlites. She was the first female assistant professor of petrography in Yugoslavia. Thin section petrography became the standard method of rock study. Petrography, crystallography, and isotopic studies are common methods used in igneous petrology. Archaeologists use petrography to identify mineral components in pottery.