Birthstones are a popular gift item for both women and men. Throughout history, there have been many myths and legends associated with birthstones. They can be traced back to the Jewish historian Josephus. He believed there was a connection between the twelve stones in Aaron’s breastplate (as described in the Book of Exodus), the twelve months of the year, and the twelve signs of the zodiac. Not all cultures have agreed on which stones correspond to which month. Therefore, you will find different lists of birthstones presented.
Link: History of Birthstones