Cult of Mac points to a report [Google translation] from Taiwanese site TechNews claiming that Apple will be including a sapphire-covered capacitive home button on the iPhone 5S in order to accommodate the fingerprint sensor rumored to be coming as a differentiating feature for the device.Apple is expected to do away with the traditional physical home button, which has long been one of the most unreliable components on iOS devices. It’s thought that using sapphire crystal, which has a hardness second only to diamond, will prevent the button from getting scratched and ruining the fingerprint sensor.