Many superstitions and legends regarding the sea have been attached to aquamarine over the years. Believed to be the treasure of mermaids, the gem is said to be especially strong when immersed in water. In times gone by, as a very last resort, sailors caught in a storm were supposed to throw their aquamarines overboard to calm the gods. Sailors were also said to have taken aquamarine to sea as a lucky charm to protect against shipwreck. People today still wear aquamarine to prevent travel sickness. A beautiful combination here with the addition of the semi-precious gemstone amethyst.