Application of reflected light, transmitted light, and cathodoluminescence petrographic techniques to the resolution of practical geological, exploration, and mineral processing problems. Also experienced in scanning electron microscopy, QEMSCAN, x-ray diffraction, x-ray fluorescence, and electron microprobe analyses. Experiences in a variety of commodities: gold, silver, base metals, rare earth metals, diamond, industrial minerals, niobium, tantalum, etc.