Definitions:
a clasp, buckle, fibula, or brooch, especially one set with precious stones, for holding together the two sides of a garment; (hence) a clasped necklace, bracelet, or the like. also, in later use: a buckle or brooch worn as an ornament; (more generally) a gem, jewel, or precious ornament.

to set or adorn with, or as with, ouches; to spangle; to set like a jewel. usually in past participle.