Diamonds are one of the most sought-after gemstones, known for their exceptional hardness and brilliance. Formed deep within the Earth's mantle under high pressure and temperature, they are primarily composed of carbon atoms arranged in a crystal structure. Their unique properties make them ideal for use in jewelry, particularly in engagement rings, symbolizing love and commitment. In addition to their aesthetic appeal, diamonds have industrial applications due to their hardness. They are used in cutting, grinding, and drilling tools. The value of a diamond is determined by the "Four Cs": Cut, Color, Clarity, and Carat weight, which help assess its quality and worth.