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.
(..) ...or not at all. The wolf begins to circle the boy. Claws of black steel... ...fur as dark night. Eyes glowing red... ...jewels from the pit of hell itself. The giant wolf sniffing... ...savoring the scent of the meal to come. It's not fear that grips him... (..)2006 300