X-Ray Diffraction (XRD) is a powerful analytical technique widely used in bauxite, gold, iron ore, and diamond mining to determine the mineralogical composition of ore samples and geological formations. The method works by directing a beam of X-rays at a crystalline material; the rays are diffracted at specific angles depending on the spacing between atomic planes within the crystal lattice. The resulting diffraction pattern acts as a unique fingerprint for each mineral phase, allowing geologists and mineralogists to identify and quantify minerals such as gibbsite, boehmite, and kaolinite in bauxite; pyrite and arsenopyrite in gold ores; hematite and magnetite in iron ore; and kimberlitic minerals in diamond-bearing formations. In mining operations, XRD is used for ore characterization, grade control, process optimization, and understanding the mineralogy of tailings and waste materials. It supports metallurgical testing by revealing which minerals are present and their relative proportions, enabling engineers to design appropriate processing circuits for maximum recovery and efficiency.