And, not surprisingly, the iPhone’s new ceramic shield front glass is scratched at a Mohs hardness level of 6, at the same level as a regular glass screen. The scratches look faint, but they are still scratched.

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Apple has coated the glass with nanoscale ceramic crystals to make it more durable to break rather than scratch. An interesting side effect of the added ceramic was found in a burning test. The iPhone screen didn’t actually burn. Perhaps ceramic has low thermal conductivity and better protects the underlying pixels. Of course, this is neither scientific nor specifically applicable for everyday use.

Anyway, this is a complete durability test.