Are all Tissot watch jewels made of ruby?

Nope they are only synthetic rubies. However Tissot Watches for men and women are doing wonderful job in the current market and they are very appreciated of their victory. read more

Modern rubies used in movements are actually synthetic sapphire (aluminium oxyde) with some added iron to get the colour red. read more

In most watches these jewels are used for all the pivot points in the gear train, as well as in the anti-shock settings (whether these be Incabloc or some other version). Those watches with complications also use jewels to reduce friction and over time, as watches became complicated, the amount of jewels gradually increased. read more