A technical survey examines the platinum-group metals, outlining their mineralogical characteristics, geological settings, and modes of occurrence in both primary and alluvial deposits. It reviews global sources and production, with separate coverage of deposits across imperial and foreign regions, and discusses extraction, assaying, and refining practices. The monograph explains associations with basic and ultrabasic rocks, summarizes distribution maps and statistical data, identifies industrial and commercial applications, and highlights supply challenges and recent exploratory efforts. A bibliography and references support further research.