Birthstone of March: Aquamarine These birthstones influence a person's temperament, fears, and strengths based on the positions of certain planets at the time of birth. We may overcome our shortcomings and become the finest versions of ourselves by incorporating them according to our zodiac and birth month.The March birthstone, aquamarine, is associated with the Pisces sign and is thought to bestow onto March ascendents honesty, kindness, wealth, and health. The stone sharpens their judgment and uses a realistic method to rein in their overly affectionate tendencies.