Deepsea challenge
Sapphire glass, not jewelry but high-tech.
It is not the first time we hear that a timepiece has a sapphire glass. Some people think it is made of real sapphire, others do not really know. Here is finally the explanation you were waiting for. There is Sapphire and Sapphire glass Sapphire is commonly the name given to the precious gemstone variety from the mineral called Corundum (an aluminium oxide). Most of the time it is blue because of the presence of iron and titanium but color…