Pukhraj or Yellow sapphire is commonly worn to get the blessings of Planet Jupiter and experience several benefits from it. Some of the recognized benefits are: Success in business, jobs, & academics, Improved financial status, health rejuvenation, marital & progeny bliss, and in alternative healing.
The first and foremost thing to do is to have a word with an expert astrologer in order to know whether yellow sapphire suits him/her or not. If Jupiter is set in the wrong houses of the birth chart, Yellow Saphire would bring negative results instead of positive results.