Ruby as we all have seen it is a red coloured stone. It is found in many shades of red and maroon and Ruby is a stone that is found in many colours apart from red but in astrology red ruby is the one that is used. In terms of hardness it is only next to diamond and nothing else. Ruby is a strong stone. It is worn by people who don't have the strong Sun. It can also be worn by those whose Sun is placed awkwardly. The Sun is associated with career and success. As per astrology, people with a strong Sun rise very high in life and quite fast.