There are three main types of mirror edges that can be applied to mirror glass; bevelled, antiqued and polished:
Most mirrors, whether plain or antique, can be supplied bevelled. Bevels normally range between 6mm and 35mm wide, the angle being more pronounced the thicker the glass.
Detail from a distressed antique multi-pane mirror with 17mm bronze pyramid detail on the mirror intersections.
POLISHED EDGE (PAR)
Where the edges of the glass can be seen, but a bevel is not required, polishing gives the glass a clean sharp finish.