Among the Kasci of Iomis, an engagement clasp was the traditional piece of jewelry worn by an engaged female, analogous to the rings popular among Humans and other cultures. A snug-fitted bangle, it was worn on the bride-to-be's upper arm. After the wedding, the bride would continue to wear the clasp.
Designs of engagement clasps varied widely, from delicate latticework to solid clasps, and the metalworking artisans of Iomis designed clasps from fairly inexpensive versions to those costing hundreds of thousands or even millions of credits. At least one jewel, usually a diamond or pearl, was common. Clasp colors were chosen to complement the skin of the Kasci in question; gold was the most common color, but the gold-skinned Kasci Jira Zaffrod's engagement clasp was platinum.
Off Iomis, other species sometimes bought engagement clasps as simple jewelry.