I choose sapphire or mineral glass on the watch?
Sapphire crystal has a very high hardness, thus protecting watch. Mineral glass (glass with high hardness) should be considered as standard. In order to increase the resistance to mineral glass often finish against scratching. Sapphire crystal has a very high hardness, thus protecting watch. Mineral glass (glass with high hardness) should be considered as standard. In order to increase the resistance to mineral glass often finish against scratching.