Sapphire crystal generally refers to synthetic sapphire, which is quite different from the natural sapphire that people usually understand, and is generally used to make watches and mirrors.
It, tungsten-titanium alloy and high-tech ceramics are all wear-resistant materials. Although these materials can resist wear, they can't withstand strong impact, and some substances with the same or higher hardness (such as grindstone, sandpaper, nail polish, granite surface, concrete wall and ground, etc. ) may scratch the surface of these materials.
Sapphire is the general name of corundum gemstones with other colors except ruby, and its main component is alumina (Al2O3). Sapphire glass refers to synthetic sapphire, which can be produced easily and cheaply in the laboratory, and its chemical composition and physical properties are the same as those of natural sapphire.
Extended data:
Sapphire is not the brand of watch. The word sapphire printed on the watch means that the surface of the watch (that is, the transparent cover of the watch pointer) is made of steel and jade. Indicates that the watch surface is relatively resistant to hemp damage. For example: MOVADO/ Movado, SUUNTO/ Songtuo, the words sapphire can be seen on these watches.
Sapphire glass/ruby glass is often used to replace other optical materials to make optical elements and infrared-transmitting optical windows, which are widely used in infrared and far-infrared military equipment, such as night-vision infrared and far-infrared sights, night-vision cameras and other instruments in satellite and aerospace technology, as well as high-power laser windows, various optical prisms, optical windows, ultraviolet and infrared windows and lenses, observation ports for low-temperature experiments, navigation, aerospace and other high-precision instruments.
References:
Baidu encyclopedia-sapphire watch mirror