Does Apple's Apple Watch Ultra screen really use a sapphire cover? The comparison of durability measurement tells you

CTOnews.com November 26 news, like the Apple Watch stainless steel model, the Apple Watch Ultra screen is covered with sapphire cover. Because sapphire is one of the hardest minerals known, it is extremely difficult to scratch, which makes it the best choice for high-end watches.

Foreign digital channel JerryEveryThing focuses on testing the sapphire cover of Apple Watch Ultra in the latest video, and compares it with Samsung's Galaxy Watch 5 and Garmin Fenix 7 smartwatches which also use sapphire cover.

CTOnews.com learned that Zack, the channel's anchor, explained in the video that sapphire is a material with a hardness close to diamonds. In terms of hardness testing, he is used to using the Morse hardness scale (which measures the hardness of minerals from 1 to 10) to test scratches, with scratches of grade 6 for glass and 8 or even 9 for sapphires.

JerryRigEverything tests show that the Apple Watch Ultra display is actually covered with real sapphires, but there are a few things to pay attention to. In the test, Apple Watch Ultra's sapphire cover showed slight scratches at grades 6 and 7 and obvious scratches at level 8 hardness.

The results of Galaxy Watch 5 are similar, although the wear of grades 6 and 7 is not as obvious as that of Apple Watch Ultra. Zack explained that this could be due to impurities in the material or polishing problems. As for the Garmin Fenix 7, tests show that it has the purest sapphire crystal of the three watches because it has little wear and tear at levels 6 and 7.