Repairing handbook on jewelry clasps

If your favorite necklace or bracelet has a broken clasp, don't ignore it and leave it alone in your jewelry box. For most types of clasps, it is an easy matter to replace the broken clasp with a new one.
Check that whether the actual clasp is broken due to the jump ring has broken or stretched open. Jump ring is a simple metal ring with a small cut on one side. If the jump ring has broken, you can replace a broken jump ring or crimp a loose ring closed.
Identify the broken clasp type and buy a replacement clasp. There are several varieties. The most common are spring-rings and lobster clasps. If the clasp is connected to the necklace by a jump ring, it is easy to replace. If the clasp is soldered on, you will need professional help.
Disconnect the old clasp from the jewelry with a pair of pliers by holding one side of the jump ring connecting the old clasp. At last, attach the new clasp. Hook the new clasp through the jump ring and twist the jump ring closed. Make sure the jump ring is closed tightly, or the clasp may slip off through the gap. Repeat for the other end of the jewelry.