Assertion: pocket watch's jewel | /r/ObjectUse | used in watch
Facets:
value: as bearings
type: MANNER
value: commonly
type: TEMPORAL
value: as bearing surfaces
type: OTHER
Source sentences:
text: Jewels are used in a watch as bearing surfaces at key points of friction.
text: There are several different types of jewels used in a watch, the most common are: Hole Jewels:
text: See our article on Watch Jewels if you're interested in learning more about why jewels are used in watches.
text: Why are jewels used in watches, and what are the jewels in a watch worth?
text: There are several different types of jewels that are commonly used in watches as described below.
text: When jewels were first used in watches as bearings, it was difficult, given the tools and equipment available, to pierce holes that were exactly central in a jewel.
text: Where jewels are used in watches  7 jewel lever watch - has these jewels: 1 impulse pin
text: The jewels used in watches are usually rubies, sapphires (which are chemically the same as rubies), garnets and diamonds.