Stone of courage.
Provides stability and helps with communication and getting things off your chest.
From Wikipedia: Aquamarine (from Latin: aqua marina, being, water : sea, i.e. sea water,marīna, from marīnus; of the sea.) is a blue or cyan variety of beryl. It occurs at most localities which yield ordinary beryl. The gem-gravel placer deposits of Sri Lanka contain aquamarine. Clear yellow beryl, such as that occurring in Brazil, is sometimes called aquamarine chrysolite. The deep blue version of aquamarine is called maxixe. Maxixe is commonly found in the country of Madagascar. Its color fades to white when exposed to sunlight or is subjected to heat treatment, though the color returns with irradiation.