Longman Dictionary of Contemporary English
crown jewel
noun
EXAMPLES FROM OTHER ENTRIES
▪ Innsbruck's crown jewel is the old town center.
EXAMPLES FROM CORPUS
▪ But the crown jewel of the disk is the 25-minute Clarinet Concerto, by Richard Faith.
▪ The petrochemical division of Pemex was seen as the crown jewel of the privatization frenzy.
WordNet
crown jewel
n. the most desirable assets of a corporation; "their crown jewels figured prominently in the takeover attempt"
Usage examples of "crown jewel".
Cordina's Crown Jewel doesn't just drop in to my store for old bottles.
But Remagev, once a holding in possession of Rohan's cousin who had died without heirs, was technically lower in rank than Tuath Castle or Faolain Lowland or Whitecliff, and certainly far below the crown jewel that was Radzyn.
He was just pulling the unconscious driver free from the car, when two gunmen emerged from the back door of The Crown Jewel.