Aquamarine is a beautiful pale green to pale blue “aqua” coloured stone. It is a form of the mineral beryl, and is very closely related to emeralds. Medium green to dark green beryl is called an emerald, pink beryl is called morganite, and light blue to light blue-green beryl is called aquamarine. Aquamarine is a hard stone, between 7.5 to 8 on the Moh’s scale.  

Aquamarine is also the birthstone for March.