Two part epoxy is often used to bond jewelry pieces together or for attaching metal pendant bails to fused art glass.
This type of epoxy is an excellent adhesive (and one of my favorites) for bonding glass to glass or fused glass to metal after glass fusing is complete.
Epoxied fused glass jewelry pieces should not be fired again in a glass kiln.
Sold in hardware stores and other locations epoxy consists of a pack containing separate resin and hardener which must be mixed in equal quantities before use.
After you mix it leave it for about 10 minutes (follow makers directions) until it is the consistency of thick honey as I find it is less likely to cause your bail to slide around. It gives you a very strong bond once set.