The base Apple Watch Series 3 comes with the same ion-strengthened glass that the iPhones use. The pricier Edition model has sapphire crystal instead, which is harder and more scratch resistant. But are all sapphires the same?
JerryRigEverything set out to test this, using a $300 Tissot watch as a control (which also has sapphire crystal). The results? Well, heres the video and there spoilers are below it.
While Apple is indeed using sapphire, its not the best quality. Impurities make it more fragile than the sapphire crystal used on a typical Swiss watch.
The same test performed on an iPhone 7 (ion-strengthened glass) showed scratches at a Mohs hardness of 6. This means that Apples sapphire crystal isnt any tougher than its scratch resistant glass (the Tissot meanwhile scratched at level 8).
A crash course on the Mohs scale: each level is twice as hard as the previous level. That means that Mohs 8 is four times as hard as Mohs 6.