Aluminum oxide (Al2O3), also known as alumina, corundum, sapphire, or ruby, is one of the best insulators used in a wide ...

Sapphire crystal, held up by analysts and industry watchers as a wonder material that's virtually indestructible, was a no-show as the display on the new iPhone 6. It's an anticlimactic end to ...

image: Ruby crystal grown on sapphire substrate at the Nagano engineering campus, Shinshu University. view more . ... Imagine having table salt, and wanting to form crystals of a desirable structure.

In the tests, the sapphire crystal on the Apple Watch Ultra had minor abrasions at levels 6 and 7, while the real damage starts at level 8. How it compares to other smartwatches.

Chopard’s New L.U.C Full Strike Sapphire Is a Crystal-Clear Watchmaking Marvel Its sapphire crystal gongs and case produce a strike four times louder than a repeater with steel gongs. Published ...

Since it debuted the iPhone 5S in 2013, Apple has claimed that its camera lens is made of a synthetically produced material called sapphire crystal. Because it's so hard, it's almost impossible to ...