iPhone 6 Sapphire: Explained!

The video delves into the durability of the iPhone 6 sapphire display by contrasting it with Gorilla Glass and earlier sapphire components. It begins by introducing the Mohs scale, which rates mineral hardness from 1 to 10, and explains how this scale predicts scratch resistance. The narrator notes that Gorilla Glass sits around 6.8 on the scale, while pure sapphire ranks at 9, implying that a steel knife blade should not scratch sapphire but can still scratch materials that are softer. He then introduces two sandpaper materials, garnet and emery, to simulate real world wear. Garnet is softer than pure sapphire but harder than Gorilla Glass, while emery is even harder, providing a more stringent test. The video demonstrates that the iPhone 6 display resists scratches better than the iPhone 5s, yet it is not pure sapphire, as garnet and emery leave marks and produce distinct sounds when interacting with the screen. Despite this, the footage emphasizes that sapphire-like performance exists in the phone’s front glass assembly, while the home button remains a true sapphire element, and that the overall display benefits from a layered approach rather than relying on a single monolithic sapphire sheet. The presenter also touches on a patented fusion process that could combine sapphire with other materials to create a laminate that improves both hardness and strength, hinting at the possibility of a more durable display assembly in future devices while acknowledging that bendability and cost considerations prevent a full sapphire front panel. In conclusion, the iPhone 6 display shows enhanced scratch resistance and bendability compared with prior models, but it is not entirely sapphire; Apple appears to leverage sapphire selectively for critical touch areas and back-end materials, balancing durability, flexibility, and manufacturing practicality.

Topics · technology · durability · consumer electronics · materials science