Diamond studded 14k white gold key charm on a 14k white gold link chain. Primitive locks and keys have been used for thousands of years, beginning with the ancients Egyptians, Greeks, and Romans. Over time, the key came to symbolize more than protection of personal property. A key grants access to something beyond a closed door – a tool to symbolically unlock knowledge, power, deeper material and spiritual understanding, and even to connect with the afterlife. By the era of the Victorians, locks were important symbols of love and commitment - a gift given to symbolically lock the wearer's heart.