Rock research. Researcher using a petrographic microscope to study the mineral composition of rock samples. A petrographic microscope is a type of opt
Rock research. Researcher using a petrographic microscope to study the mineral composition of rock samples. A petrographic microscope is a type of optical microscope that has removable polarising filters to allow the study of thin sections of rocks and minerals under polarised light. Different samples show different light patterns under polarised light depending on the minerals they contain.
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Photo credit: © JON WILSON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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