Peridot Ring Gemstone For Best Results.It Is Said To Encourage Strength And Courage And Enhancing Self Confidence. This gemstone is known as marsh blood stone is the gemstone for mars/mangal as per indian vedik astrology.Mars is the planet of energy, vitality,blood circulation and ambition and this stone is worn to boost the energy of mars in the horoscope. This is useful in cural diseases related to blood, people having manglik dosh in their kundli can wear this. this stone is quite effective to reduce anger, frustration, differences & bring peace of mind.