Jakarta Selatan, Indonesia. 26th Apr, 2016. The researcher inserts inside the Scanning Electron Microscope 'SEM' machine the rock holder. SEM is used to analyze rock minerals up to 1µm. It can zoom than usual polarize microscope. © Anton Raharjo/Pacific Press/Alamy Live News

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Keywords: electron, electronic, gas, geologist, geology, laboratory, microscope, mineral, natural, oil, research, rock, scanning, science, sedimentology, sem