Before we start our journey of uncovering the Cancer birthstones let’s take a moment and get an overall idea about the distinctive personality traits of Cancer zodiac signs. Cancer, the fourth sign of the zodiac, is known for its compassionate, kind-hearted, extremely loyal, nurturing, and emotionally sensitive nature. Individuals who are born between June 21 and July 22 fall under this category and are ruled by the Moon, which perfectly justifies their loving, caring, highly vulnerable, and protective qualities. In the zodiac calendar, these Cancerians are shown by the symbol of crabs. Encountering a Cancerian is like witnessing a person who is as protective, determined, and strong as the shell of a crab and capable of existing in both emotional and material realms.