The color blue is often associated with serenity, reliability and stability. Sometimes it’s also said to create ambivalent and sad feelings. But there are some shades of blue which can’t be associated with anything else other than luxury and brilliance. Here, we are referring to two such gemstones, Tanzanite and Aquamarine, which have carved a niche in the field of jewelry. Both are blue but have no other common factor apart from sharing the single color family.