Tissot Couturier Lady Silver Dial White Leather Strap Watch For Women - T035.210.16.011.00A sapphire crystal gives a watch the following properties: extremely high resistance to impact and superior screen and hand readability thanks to its transparency. Because it is the strongest material after diamonds, it is used in fine timepieces for its anti scratch prowess. Sapphire crystals can take many forms and give the watch a variety of looks: flat, domed, concave or ground. Ensuring visibility under all conditions is an important goal for