Aquamarine has a shielding effect on your energy field and has even been used for physical protection during battle and at sea. The stone is said to help you sift through energy and information, create mental clarity, and soothe an overactive mind; it's even used to improve the intellect.
Aquamarine is a stone of courage. Its calming energies reduce stress and quiet the mind. Aquamarine has an affinity with sensitive people. It can invoke tolerance of others and overcomes judgmentalism, giving support to those overwhelmed by responsibility.