Navratna Navgraha Ring in Gold. This beautiful and attractive Navratna Ring is made in silver with high quality, natural, nine gemstones - yellow sapphire, ruby, blue sapphire, pearl, coral, hessonite, cat''s eye, crystal and emerald. Nav Ratna Navgrah Ring - The navratna or Nine Planet 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). Featured in various astrological books, the navratna 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 navratna without showing one''s horoscope to an astrologer. The navratna 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.