Opal symbolizes confidence, clarity, and calmness and is said to promote faith in oneself and hope for the future. Wear an opal pendant to capture these qualities. Tanzanite is the gem of fortune and luck. A tanzanite pendant is said to ease stress and free one from bad habits. Wearing an aquamarine is said to help couples smooth out their differences and reawaken their love for each other making an aquamarine pendant the perfect anniversary present.