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  • Marisa Acosta

SEM image of 20 micron long euhedral bipyramidal quartz


The image above is a BSE image (one would usually image 3D topography with secondary electrons, but when working with really 3D samples BSE is less susceptible to charging and so often yields better images). This sample shows some euhedral faces of quartz crystals, as well as one little dipyramid that was glommed onto a larger quartz substrate. Dipyramids can form either by homogeneous nucleation or by nucleating on a tiny particulate (the more likely of the two) .

University of Oregon

Department of Earth Sciences

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