Why use sapphire for watch mirror
Synthetic sapphire is one of the hardest objects in all nature, with a Mohs hardness of 9. The hardness of synthetic sapphire is second only to diamond, and maintains its high strength at high temperatures. Synthetic sapphire crystals have good thermal properties, as well as excellent electrical and dielectric properties. In addition, synthetic sapphire combines almost complete resistance to acids and alkaline substances. Sapphires are used in watches because of their resistance, toughness and beautiful appearance. Why choose sapphire crystal Synthetic sapphire crystal or "glass" is actually not glass at all. It is a very hard, transparent material made of pure alumina that crystallizes at very high temperatures. sapphire watch glass ,Synthetic sapphire has the same hardness as natural sapphire gemstones, but there is no colorant that imparts various tones to the gemstone. When it is heated, the synthetic sapphire is formed into round blocks, which are then cut into piece...