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https://www.prestigetime.com/blog/what-are-the-jewels-in-a-watch-for.html
Dec 11, 2020 · Watches are no different and also use bearings and these bearings that are found in the higher-end automatic and hand-wound watches are made out of jewels. These precious stones are smooth and don't allow much friction and are therefore …
https://diefendorffwatches.com/blogs/news/what-are-jewels-in-a-watch
Watches have tiny pieces of synthetic ruby inside of them to help in the frictionless movement of the many tiny parts in your watch - 26 jewels simply means that there are 26 of them and 17 mean that there are 17 of them. Are the jewels in a watch valuable? Unfortunately, they are not valuable.
https://quillandpad.com/2018/06/29/the-number-of-jewels-in-a-watch-movement-indicates-value-doesnt-it-a-myth-debunked/
Jun 29, 2018 · The jewels that we use in watches today and decades past are synthetic, the most common being synthetic ruby. These jewels are grown in a controlled environment as something called a boule, the French word for a cone-shaped chunk of the material.
https://watchranker.com/why-watches-have-jewels/
Jun 20, 2018 · Stones or jewels are used in watches to prevent or reduce friction between the surfaces of moving metal parts within a watch. When metal rubs against metal in the absence of lubrication, the moving parts like pivots and bearings in a watch can get worn quickly, which can lead to the watch breaking down.
https://millenarywatches.com/jewels-in-movements/
Nov 26, 2019 · Today, almost all jewels used in watches are synthetic ruby or sapphire. Back in the days, jewel pivots were made by grinding using diamond abrasive. However, today, the jewel bearings are normally made using high-powered lasers, chemical etching, and ultrasonic milling. Benefits of watch movement jewels
https://strapchange.com/what-are-watch-jewels-what-does-21-jewels-mean/
Meaning all the rotating parts and other high frictional points in the watch; which before were metal againts metal parts, were exchanged with hard jewels. Back in the days it was natural jewels (diamonds, sapphire and rubies) which were grinded and put into the watches.
https://www.menshealth.com/style/a19543455/real-reason-watch-movement-jewels/
Sep 11, 2014 · Watches were released with 75 or even 100 jewels—the majority of them utterly non-functional, though to an uneducated eye, it may have appeared …
https://en.wikipedia.org/wiki/Mechanical_watch
Jewels in modern watches are all synthetic sapphire or (usually) ruby, made of corundum(Al2O3), one of the hardest substances known. The only difference between sapphire and ruby is that different impurities have been added to change the color; there is no difference in their properties as a bearing.
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