Beacon Adhesive's Gem-Tac is a premium quality adhesive formulated specifically to secure gems and rhinestones.
 
One of the only adhesives that is suitable for applying mirror backed stones as the glue won’t warp or alter the appearance of gems or rhinestones. It dries crystal clear and is made from a safe, non-toxic formula.
 
The bottle tip is very fine allowing for precise application and with 59.15ml (2 fl oz) it is an excellent size as you really only need a tiny amount per gemstone, so will last you a long time!