By now, you may have read several reviews of Apple's latest iPhone model. One of the biggest talking points about iPhone 4 is the material used for the glass panel. Apple has noted that the screen is made of aluminosilicate glass, which is the same type of material used in the windshields of helicopters and high speed trains.
These panels are said to be 20 times stiffer and 30 times harder than plastic, which makes the glass virtually unbreakable and scratch-proof.