How to attach stained glass to large mirrored walls?

we are putting together a stained glass mural similar to tilework
we are baking the glass pieces in a kiln to make glass tiles
and want to attach the design to large mirrors without spoiling the see through effect of the clearer pieces
there will still be large expanses of mirror with areas of mural design scattered across the wall
does anyone have experience with adhesives that have endured and also provides the clearness?