The aquamarine belongs to the beryl family. Aquamarine is available in a wide variety of shades of blue, from delicate light blue to deep dark seawater blue. This is where its name comes from, aqua marina, which means “seawater colour” in Latin. The most expensive aquamarine colour is the deep blue and is also commercially known as the “Santa Maria colour”. The origin of this name comes from the mine of the same name in Brazil, which initially produced particularly dark aquamarines.