Aquamarine is blue with hues of green, caused by trace amounts of iron found within the crystal structure. It can vary from pale to vibrant and transparent to translucent. Better transparency in aquamarine gemstones means that light may go through the crystal with less interference

Historically, it was believed to be the treasure of mermaids and used by sailors as a talisman for good luck and protection on the water. Today, aquamarine is still associated with the qualities of the sea, such as serenity, harmony, and balance. It is also considered a stone of courage and communication.

Aquamarine is most often associated with feelings of calmness and tranquillity. It is believed to help manage stress and quiet the mind, making it an excellent choice for emotional balancing.

Aquamarine's color range is very narrow: It can be blue, very slightly greenish blue, greenish blue, very strongly greenish blue, or green-blue. The gem's most valuable color is a dark blue to slightly greenish blue with moderately.