Noun
a precious stone that is a valuable part of a sovereign's regalia
the most desirable assets of a corporation
Source: WordNetHealthcare is the cornerstone of the socialist state. It is the crown jewel of the welfare state. Monica Crowley
With this announcement today, the Army has made it clear what we have known all along - that Fort Riley is truly the crown jewel of the United States Army. Jim Ryun
And in terms of their crown jewel legislative achievement: who knew that when asked, 'will government impose a new federal mandate requiring middle class Americans to buy health insurance whether they can afford it or not?' The answer would be 'Yes we can!' Artur Davis
their crown jewels figured prominently in the takeover attempt Source: Internet