Aquamarine is a beryl crystal made up of beryllium aluminum cyclosilicate. It’s cousin in the same family is would be the Emerald and Kunzite. In nature Aquamarines can be found in a hexagonal crystal structure and it can grow to be several meters tall. Most beryl crystal is colorless but it’s often it is also tinted with impurities which give it colors such as Green, Yellow, Blue, or even red which is the rarest of them all in this crystal.
The name “Beryl” means “precious blue-green color-of-sea-water stone” From the greek “βήρυλλος beryllos“. This term was later adopted for the whole beryl family.