BeaconAdhesives Gem Tac Permanent Adhesive, 2-Ounce (Pack of 2 - White)

These are good and they dry quite quickly and hold up really well! I use this all the time!

This is one of the best gem-to-fabric glue out there. Easy to work with, dries clear and great adhesion to material. I apply crystals to wool, and they all stay put (unlike others, where the glue gets absorbed into the fabric leaving nothing to stick to)