Aquamarine gemstone is a member of the beryl family, which includes emerald, morganite, and heliodor. It is composed of beryllium aluminum silicate and typically has a hexagonal crystal structure. The most common color of aquamarine is a pale blue, but it can also range from greenish-blue to deep blue. The intensity and hue of the color are influenced by trace amounts of iron in the crystal structure. Aquamarine is used in industrial applications, such as in producing lasers and optical components.