Hi Pam you can frame it, see the attached video, use rough lumber for a rustic look
Paint the frame a new color. How big is this mirror? If it is really big you could put a small bookcase type of item in the middle making this two mirrors. This site explains it much better then I can: https://www.hometalk.com/1025680/large-bathroom-mirror-redo-to-double-framed-mirrors-and-cabinet?expand_all_questions=1
You can measure the mirror and buy a frame that's a good fit. Use a good strong glue to attach the frame to the mirror.