A crystal watch is a type of watch that uses a thin piece of quartz crystal to keep track of time. Quartz crystal is piezoelectric, meaning that it produces a small electrical charge when it is compressed or bent. This electrical charge can be used to power a tiny motor that keeps the watch’s hands moving.Crystal watches are more accurate than mechanical watches, which use a system of gears and springs to keep track of time. They are also more resistant to shock and vibration, making them ideal for sports and other activities. However, they are not as durable as mechanical watches and can be damaged if they are dropped or hit too hard.