BANGALORE: A sapphire screen is almost diamond-hard, indeed unbreakable cell phone screen. And it was lot rumored that iPhone 6 will come up with sapphire screen but is a wonder material that doesn't scratch and even it is also unbreakable, reports Business Insider.

The current iPhone uses Corning's Gorilla Glass that is moderately scratch resistant, but not as good as sapphire.

There are two things people really want from an iPhone - long battery life and an unbreakable screen.

Now the real fact is sapphire is not the wonder material that many people think it is. It actually breaks easier than glass.

Recently, long time tech analyst Tim Bajarin wrote a story for Time magazine about sapphire screens for the iPhone.

"My sources tell me that sapphire was never targeted for the iPhone 6 or 6 Plus and its role in future iPhones hasn't even been decided yet," said Bajarin.

While it may eventually show up on the iPhone, Bajarin said there are a number of problems with sapphire.

Sapphire is thicker, bulkier than glass and it is more likely than glass to break when you drop it.

A sheet of sapphire is 10X the cost of a sheet of glass, which would lead to another $100 in cost for the iPhone. Consumers are unlikely to pay another $100 for the iPhone.

Sapphire is worse for battery life, whereas, glass is more transparent so light travels through it easier.

Sapphire is good at preventing scratches but not good at preventing cracks from forming, which leads to the screen shattering.

Sapphire is still used for the glass on the iPhone's camera since it's more scratch resistant. It's also used on some of the Apple Watches. Sapphire glass is less of a risk on a watch since there is no risk of dropping a watch.

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