Watches with movement with stones

 

— when they talk about "mechanism with stones", they mean not decorative stones, but functional elements of the structure. For the most part, they play the role of bearings: the specificity of watch wheels is such that stones of a special composition (usually synthetic diamonds or rubies) fit this role much better than metal. In addition, these materials can be used for other parts requiring high reliability. Classic mechanical watches are almost always equipped with stones, but among quartz watches they are more an indicator of the high class of the mechanism than a really necessary measure.