In the language of gemstones, aquamarine represents happiness, hope and everlasting youth. In ancient times, aquamarine was thought to protect those at sea. Today, aquamarine is still thought to bring protection to those at sea and is a popular gift among ocean travelers. On land, it is believed to have soothing effects on couples, helping them to work through their differences and ensure a long and happy marriage. That power makes it an excellent stone to give on anniversaries.