On Fri, 19 Jun 2020 02:15:37 -0700, Tricky Dicky wrote:

I once saw a professional cut a mirror at a local glaziers and he just
scored one side. Unlike window glass I think mirrors have to have the
edges ground/polished before being handed to the customer which would
probably take out any fraying of the silvered layer.

Richard

This is a mirror that I ordered and It arrived broken, the vendors don't
want it back, so I thought I would trim it up.....I can always seal the
edge of the silvering with super glue.