Polished diamonds are gemstones that have been cut and finished to enhance their brilliance and sparkle. The polishing process involves grinding and smoothing the diamond's surface, which allows it to reflect light effectively. This transformation from a rough stone to a polished gem significantly increases its value and appeal. The quality of a polished diamond is often assessed using the Four Cs: cut, color, clarity, and carat weight. Each of these factors plays a crucial role in determining the diamond's overall appearance and worth. Polished diamonds are commonly used in jewelry, such as rings, necklaces, and earrings, making them highly sought after.