The Gem Stone of Sun Astrologer Suggestion for Birth Star Krithigai (Krithika) Uthiram (Uthraphalguni) Uthiradam (Uthrashada) Ruby Benefits & Ruby Astrology In the Navagraha system of Planetary Gemology Ruby is the Gem stone that is used to enhance the power of Sun. The sun is the vital life force and represents the soul of the Kalpurusha. An Individual who's Sun position is well placed in his birth chart can never be un successful. He will always be in lime light whether as a union leader or a states man. Variety : Natural Ruby Shape : Any shape cut (Tablet, oval, rectangle, Square)