Emeralds come in various shades of green, the most valuable of which come in a slight blueish-green color. Emeralds have been both a popular and valuable gift since the times of Ancient Egypt, and were especially popular in Ancient Rome. The name Emerald comes from the Latin "smaragdus" which means green. According to tradition, they bring hope, new possibilities, and clairvoyance to the wearer. They rank a 7.5 the Mos hardness scale. Emerald is the official birthstone for May. Learn more about Emerald from the Gemological Institute of America (GIA)