I have a small glass shelf (250mmx50mm) that I would like to fit in an alcove in a bathroom (will not be exposed to water, just minimal condensation). I need to fix it to glass mosaic tiles (on sides) and ceramic tile (at back), therefore cannot drill as the tiles will likely split. The shelf is mainly decorative but will be holding a little weight (candles / perfume bottles), so need it to be sturdy.
Would a putty or adhesive be suitable? If so any specific recommendations would be very much appreciated.