An infrared (IR) method for qualitative analysis of minerals to complement X-ray diffraction was evaluated. Pellets were prepared of the following minerals: actinolite (12172677), amosite (12172735), anthophyllite (16829439), crocidolite (12001284), tremolite (14567738), gedrite (12173363), quartz (14808607), cristobalite (14464461), tridymite (15468323), kaolin (1318747), vermiculite (1318009), corundum (1302745), hematite (1317608), magnetite (1309382), muscovite (1318941), pyrophyllite (12269782), talc (14807966), antigorite (12135863), serpentine (12168922), and chrysotile (12001295). Pellets were scanned at wavelengths between 15 and 25 microns on an IR spectrophotometer. The minerals were chosen as being either direct causes of disease, or associated with other minerals that cause occupational diseases of the lung. Sensitivity was determined using 50 micrograms of quartz with 300 milligrams of cesium-iodide. A sensitivity of 0.1 percent was obtained. The authors conclude that the use of solid IR spectroscopy greatly augments the X-ray diffraction spectra for mineral identification. The method by itself is helpful in analyzing dust samples in the industrial health field. Sensitivity of 0.1 percent is possible in a 10 milligram sample.