Xiaomi just released their flagship Mi 9 smartphone.
A powerful colorful fairly priced device. But is the Mi 9 durable?
The only way to find out is with a durability test.
We will be scratching the ‘sapphire glass’ camera lens cover to find out if the sapphire is real or not.
I also have a diamond selector tool to test the thermal conductivity of the gemstone like material.
Sapphire crystal is a super premium material. Its hardness level is right next to diamonds on the hardness scale.
But when sapphire is not pure… it does not maintain the level of hardness that a pure form would. Sapphire should not start scratching until a level 8 or 9 on Mohs Scale of Hardness.
In depth review on Apples Sapphire:
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