The navratana or nine gems influencing the nine planets are: Ruby (Sun), Pearl (Moon), Red Coral (Mars), Emerald (Mercury), Yellow Sapphire (Jupiter), Diamond (Venus), Blue Sapphire (Saturn), Hessonite (Rahu) and Cat''s Eye (Ketu), With extra benefits of Panch Mukhi Rudraksh. Featured in various astrological books, the navratana when arranged in a particular order are found to be beneficial for everyone. These gems intensify the rays of the planets they represent and are considered to be the best method for strengthening the positive influences of planets. Each gem stone is specific to a certain planet and reflects the positive traits of that planet. One can even wear navratana without showing one’s horoscope to an astrologer. The navratana are widely regarded as being beneficial in all kinds of diseases, but especially those caused by contact with poisons. They are also a safeguard against misfortune, help ward off danger, and remove obstacles in life.