Blue Sapphire or Neelam is recommended for natives with weak or unfavorable Saturn aka Shani. It is worn to enhance overall well-being in life. It livens aspects like justice, Karma. It stops struggle, makes luck-fate favorable, especially at work, in business etc. It helps cure in certain diseases related to cancer, liver, nervous system etc. It enables happiness, well being of children and so forth. Astrology consultation is important before wearing the stone. Each person has his/her unique birth chart, planets' positioning-placement.