What is a crowning achievement of star status?

Stardom in the eyes of the directors who know more about the subject than anyone else equate the rare phenomenon with the ability to generate interest.  They explain that while studying one's craft will make one a better performer that this is a different element than stardom.

There are those with inferior diction and emphasis who have electrified screen audiences.  On the other hand, many who have mastered the basic elements of the acting craft were unable to generate the level of excitement that enthralled cinema audiences.

Hollywood born and bred Gloria Grahame was a combination of both, someone who had that indefinable electricity that prompted fans to buy tickets to her films while at the same time delivering her lines in the most professional fashion, her emphasis on consistent perfection.