Reply by crank49

A waterjet machine can cut anything you want, but at $80 per hour it may not be what you want either.
Drilling the corners with a diamond drill makes sense.
Then scribe hole to hole and also corner to corner; then rap the center of the cross.

Or, as Steve said, take it to a glass shop. My local shop always surprises me how cheap they are.

-- Michael :-{| Diapers and politicians both need to be changed often; and for the same reason.