Each month of the year is traditionally associated with a gemstone. For those born in March your birthstone is aquamarine, which belongs to the same mineral group as emerald. This precious gemstone is known for its blue colour with hues ranging from deep blue to pale blue and slightly greenish blue. The name is derived from Latin and means 'water of the sea'. Aquamarine was used as a talisman for sailors to protect them on long voyages.