The Link bracelet for the Apple Watch took nine hours to make.
For the Watch Edition models, Apple made a new type of gold alloy that it says is twice as hard as standard alloys.
The Apple Watch's Modern Buckle is made of the same material NASA used to make the landing airbags for the Mars Rover spacecraft.
Apple made stainless steel even harder through a cold forging process. The result is a new material that's 80% more durable than regular stainless steel.
next slide will load in 15 secondsSkip AdSkip AdThe Apple Watch Sport is made of the same aluminum as competition bicycles.
It took Apple's industrial design chief Jony Ive a whole year to decide that the watch's straps should click into slots.
The grooves in each Apple Watch band are precision-engineered.
To make the Sport edition, Apple heats a type of ceramic called Zarconia at 2,640 degrees Fahrenheit. That’s hotter than lava, which can reach temperatures of 1,600 degrees Fahrenheit according to LiveScience.
The glass covering the Sport Edition's screen is the same type of glass used for the windows of high speed trains and space shuttles.
next slide will load in 15 secondsSkip AdSkip AdApple made a new type of display for the watch that uses blacks that are deeper than those in the iPhone's screen to make images more vivid.
Now check out the biggest differences between the Apple Watch and Android Wear...