Nearly most of camera lens is made of glass. Now some manufacturers adopt sapphire to make camera lens. Compared with glass, the biggest advantage of sapphire is its hardness. It's nearly twice as hard as standard glass, and nearly as hard as diamond. The extremely high hardness means it is nearly impossible to scratch it. Sapphire also have a compressive strength of 2,000MP, about ten times that of stainless steel, which means it is extremely strong. Those attributes can guarantee the optics of the camera work without defects for a long time.
But until now only a few of cell phones use sapphire lens or screens. That’s because sapphire is about 10 times more expensive than glass. And it takes about 100 times more energy to generate a sapphire
But until now only a few of cell phones use sapphire lens or screens. That’s because sapphire is about 10 times more expensive than glass. And it takes about 100 times more energy to generate a sapphire