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. Ruby is known as the gem of courage. Wearing a ruby pendant can help you get through the trials and tribulations of life. A sapphire is said to bring serenity and purity to the wearer. Wear a pink sapphire pendant for serenity and purity with a splash of fun and irreverence.