Ruby jewelry is highly beneficial to those born under the zodiac of Capricorn. Since the planet Saturn rules Capricorns, Ruby is also governed by it. Being a this stone supplies the wearer with never-ending passion and power. This stone will ground you down to the essence of who you are. Apart from Capricorn, Ruby also shares a connection with the people born under the zodiac of Cancer. Ruby can help Cancerians increase their self-esteem and self-worth, allowing them to be bold and determined in everything they do.