A Rugged SAPPHIRE Covered Smartphone? - Durability Test! by JerryRigEverything
See how durable this new Kyocera DuraForce Pro 2. They claimed that it was covered by Sapphire. You can see on the video how the phone can stand thru scratch, burn, and bend test.
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That is really a tough phone, not just the body but also with the sapphire glass.
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Kyocera is known for durable semicon and mfp, so there's no surprise that they made a real durable phone. I think JerryRigEverything is right, this phone would be the most rugged phone of the year.