The world of forensic microscopy is complex and challenging. There is a never-ending variety of requested examinations and consequently, the analyst is often asked to work in an area of little familiarity. Adding to the challenge is the inherent problem of having no exact information as to the condition of the sample prior to the crime. The forensic microscopist is expected to have mastered proficiency in polarized light microscopy in order to identify fibers, minerals, insect parts, woods, metals, biological fluids, pollution particles, microchemical techniques, paints, pigments, pollens, drugs, explosives, diatoms, safe insulation, etc. and to compare samples of all the these plus hairs, glass, etc., etc.