Quartz

[Queso]

Can someone please explain to me how quartz is used to power watches?

[DougF]

Here I think this will answer your question. :phones:

 

The Quartz Crystal

There was no problem with the choice of a timing element. The quartz crystal is possibly thousands of times better for timing than the tuning fork, and quartz crystals had been around for many years. Only the type and the frequency of the crystal needed to be chosen.

Howstuffworks "How Quartz Watches Work"