River sharp sand is a fundamental fine aggregate widely utilized in the construction industry due to its distinct physical and chemical properties. This paper provides a comprehensive analysis of the multi-faceted roles of river sharp sand in various construction applications, including concrete production, mortar and plastering, base and sub-base layers, and backfilling. It delves into the specific characteristics that make it suitable for these applications, such as its particle shape, gradation, and purity. Furthermore, the paper highlights the significant advantages of river sharp sand over land (pit) sharp sand, particularly emphasizing its natural washing process, consistent quality, and lower content of deleterious substances. While acknowledging its indispensable nature, the paper also addresses the environmental and sustainability challenges associated with its extraction, advocating for responsible resource management and the exploration of alternative materials. This analysis aims to underscore the critical importance of river sharp sand while promoting a conscientious approach to its utilization in modern construction practices.