If your watch's crystal is chipped or shattered, you should have it replaced. The crystal protects the watch dial while reducing glare. Watch crystals can be crafted from glass, acrylic, synthetics, or genuine sapphire. The watch repair cost depends on the brand, type of crystal being replaced, size, and repair service. The price ranges for crystals range from $30 for an acrylic crystal to $150 for a sapphire crystal.