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Originally Posted by zippyt
But Bruce , jewel on jewel would scratch the jewels , where jewel on hardened steel would whear properly ?? Just curiouse ???
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I have seen jewel on jewel used before but its rare (does not fit in with common movement designs). The jewels are beveled to a round shape to reduce contact and lubricated with a very small amount of specially made oil. The jewels (mostly rubies or quartz) greatly increase the life of the internal parts of the watch.