Genuine aquamarine gemstone and sterling silver ring. The stone appears blue in some of the photos because it’s very hard to photograph, but it is lighter blue with a touch of green. March Birthstone Aquamarine is associated with zodiac signs like Pisces and Aquarius. The gemstone for ‘throat chakra’. Aquamarine is also said to be a stone of protection, helping to guard against illness and misfortune. More popularly, because of its “sea origins,” it is said that the stone can protect you from your fear of drowning. Today, many people still view aquamarine as a symbol of good luck and protection.