Fish Hook Clasp on Angel Skin Coral Beads.

Clasp

Any fastener used in jewelry. There are many types of clasps from the very basic hook and loop to mechanical clasps that are spring loaded. They may be strictly utilitarian or they can be decorated with gemstones, enamel, and engraving to the point that they can also serve as a focal point for a piece of jewelry.

Floral Diamond Clasp on a Double Strand of Pearls.