The English word aquamarine comes from the Latin word for “sea water”, which reflects aquamarines greenishblue to blue color. Aquamarine is a true lady of the evening and night. An aquamarine that looks good in sun light will only improve under artificial lighting at night unlike some darker gemstones which can look great in daylight. But can lose some of their allure in dark lighting. Aquamarine is the birthstone for March.