Assertion: pocket watch's jewel | /r/HasProperty | synthetic
Facets:
value: in any watch
type: TEMPORAL
value: usually
type: DEGREE
Source sentences:
text: The jewels would be synthetic in any watch made in the period in question, and 17 jewels would make it a "fully-jeweled" time piece, i.e. an appropriate number of jewels for a reliable mechanical watch.
text: A jewel is a real ruby, or a synthetic gemstone, that reduces friction in the gear trains.
text: Jewels in modern watches are all synthetic sapphire or (usually) ruby, made of corundum (Al 2 O 3 ), one of the hardest substances known.
text: The red rubies seem to be rather expensive, presumably they were natural gem stones rather than the other "jewels" which were synthetic.
text: The jewels would be synthetic in any watch made in the period in question.
text: A jewel is a real ruby or synthetic gemstone that acts as a bearing for the gear trains to reduce friction which can adversely affect the accuracy of timekeeping.