In western Astrology Ruby is the birthstone for the month of July. However, as per Vedic Astrology Sun the planet representing the powers of the Ruby is the lord of the sign of Leo. If the Sun is posited well in the horoscope then Ruby can be worn by the individual. The effects of Ruby on the individual differ as per the house that Sun controls in the chart and the combinations it makes in the chart. Ruby Gemstone is good for people in leadership positions and politics since Sun is the ruler of the planets. It is an excellent Gemstone that gives protective powers especially to the heart. The Ruby gemstone is good for self esteem and confidence.