He owns several successful businesses but this company is the 'jewel in the crown'. [=this company is the most valuable/important/admired]
The guests were heavily 'jeweled'. [=the guests were wearing a lot of jewelry]
The building is regarded as one of the 'jewels' of modern architecture.
(..) Doc, but you leave me no choice. Fellow citizens, you're all aware of our town's proud history. Here she goes again. Radiator Springs, the glorious jewel strung on the necklace of Route , the mother road! It is our job and our pleasure to take care of the travelers - on our stretch of that road. (..)2006 Cars