Fact #762: The “quartz movement” used in watches and clocks is so named because there is a tiny tuning fork made from quartz inside, which oscillates at a very precise frequency to keep time.

Quartz timepieces are more precise than automatic timepieces, which are spring-powered, but are far less intricate and detailed than automatic timepieces.

Quartz (left) vs. mechanical (right)

Source: http://www.watchco.com/watch-guide/quartz-automatic/

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