According to the saga the aquamarine originated in the treasure chest of fabulous mermaids, and has, since ancient times, been regarded as the sailors’ lucky stone. Aquamarine is the birthstone for those born in March.
In Antiquity, as well as in the Middle Ages people believed that the cosmos is reflected in gemstones. No surprise that aquamarine is assigned to planet Neptune. The esoteric movement revived the ancient belief and the gem industry made it another marketing tool to promote certain gems.