A petrographic and geochemical study of tin-bearing pegmatites provides a comprehensive analysis of the pegmatitic rocks in the Masuku Mission area, located in the Choma District of southern Zambia. This region is geologically significant as it is based on lithostratigraphic units of the Mesoproterozoic, which are part of the Choma-Kalomo block. The study highlights the geological events that occurred between 1,600 and 950 million years ago and examines the Sn-bearing pegmatites, which represent a potential source of tin, tantalum, gemstones, and rare earth elements. Through detailed petrographic and geochemical analysis, a deeper understanding of the mineralogical composition and economic significance of these rocks is provided. This specialized book is aimed at geoscientists, mineralogists, and professionals involved in resource exploration and utilization.