The gemstones never carry their side effects. In fact the gemstones hold the characteristics of their corresponding lord planet and their role in the horoscope of a human kind. Simultaneously, Ruby holds the characteristics of Sun and it works according to the role of Sun in the horoscope of a person.
When a person wears a Ruby ring, the power of Sun gets enhanced. Now it is depending on Sun as what role it should play as per your Ascendant and Moon zodiac sign. Hence it is necessary to know your Ascendant and Moon zodiac sign before adopting Ruby gemstone. The side effects of Ruby gemstone / Sun’s role are having three type of following views:
Ascendant and Moon zodiac View
If Sun is the lord of 6th 8th or 12th house in your horoscope, then its role in your life is to create negative effects in life such as fever, ulcer, heat stroke, debt, enmity, hurdles, death, expenses etc. In this case if you adopt a Ruby ring then power of Sun would get enhanced and the problem in life would also increase. Hence Ruby gemstones can not be adopted in Pisces, Capricorn and Virgo Ascendant / Moon zodiac.
If the Sun is placed in the 6th 8th or 12th house of your horoscope being the lord of good houses, it also plays the same role as mentioned above. In this condition also Ruby can not be adopted.
If the Sun is the lord of good houses and also placed in good house then Ruby gemstone can be adopted provided that the power of Sun in your horoscope is between 0-9 degrees or between 21-30 degrees. But if the Sun is between 10-20 degrees in horoscope then Sun is self sufficient to give its full result without any help of Ruby. In this case if any one adopts the Ruby gemstones, the power of Sun becomes overdose hence balance of other elements in body gets disturbed.