Birthstones are given to reflect the characteristic personality of the wearer. It is believed that, like the zodiac gemstones of which they became popular, the wearer will benefit from the mystical properties that they channel. It is also believed that the original derivation of the zodiac or birthstones refer to Aaron, brother of Moses, and his breastplate in Exodus.
The reported properties for the Emerald are loyalty, faithfulness and friendship. The therapeutic properties of the Emerald are reputed to be effective for health and well being problems relating to health of the eyes, fertility, the spine and headaches.