QEMSCAN is an abbreviation standing for quantitative evaluation of minerals by scanning electron microscopy, and a registered trademark owned by FEI Company since 2009.

The integrated system comprises a scanning electron microscope (SEM) with a large specimen chamber, up to four light-element energy-dispersive X-ray spectroscopy (EDS) detectors, and proprietary software controlling automated data acquisition.

The elemental composition in combination with back-scattered electron (BSE) brightness and x-ray count rate information is converted into mineral phases.

Sample preparation requirements include a level, dry specimen surface, coated with a thin electrically conductive layer (e.g. carbon).

As a result, it has commercial and scientific applications in mining and mineral processing;[2] O&G;[3] coal;[4] environmental sciences;,[5][6] forensic geosciences;[7] archaeology;[8] agribusiness; built environment and planetary geology.