Aquamarine is a blue to green-blue variety of precious beryl. The beryl group of minerals is most famous for chromium-rich, green emerald, which happens to be one of the ‘Precious Four’ gems of the world (diamond, sapphire and ruby are the remaining three). Aquamarine is one of the official birthstones for those born in March. Aquamarine is exceptionally hard and has an outstanding glass-like luster. It is most famous for its breathtaking sea-blue colors which can range from light blue to dark blue. The name ‘Aquamarine’ was derived from an old Latin expression which meant ‘seawater’.