Jewel

An ornament of dress usually made of a precious metal, and having enamel or precious stones as a part of its design.

A precious stone; a gem.

An object regarded with special affection; a precious thing.

A bearing for a pivot a pivot in a watch, formed of a crystal or precious stone, as a ruby.

To dress, adorn, deck, or supply with jewels, as a dress, a sword hilt, or a watch; to bespangle, as with jewels.