Aleš Lombergar

You can cut tempered glass with a tungsten carbide glass cutting blade, diamond cutting saw or similar tool (20,000rpm). Anything that is not sharp enough will break tempered glass. It takes practice but you should be able to do it on the first try with the right tools. Be sure to have a firm grip on the glass or it can slip while cutting and shatter.

I am the manager of a custom glass factory. My father is a retired glass worker who now makes decorative glass pieces in his free time. I know a great deal about glass working and processing.

i ve worked in a glass studio for 5 years now- and cutting tempered glass isnt an option- it is under internal pressure like Irv S said- and it is made so that when that pressure is disturbed it explodes into chunks for safety instead of shards like standard glass.

You can have it tempered afterwards- but that is very expensive- have you checked out an auto glass or glass and mirror shoppe that sells tabletops and such
they can usually get that done for you for a good price

but if you have nothin to lose- try cutting it and see what happens