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.
(..) got lots of money to spend on people. Me, I... I don't care about... clothes and money and jewels... and furs, and things like that. Lots of the other girls do, (..)1969 Butch Cassidy and the Sundance Kid