Navajo styled silver pendant with May birthstone Emerald. The properties with which the Emerald is associated - loyalty, faithfulness and friendship. The Traditional Metaphysical Properties for the May Birthstone Emerald are memory, clairvoyance and faith. The healing properties of the May birthstone are reputed to be effective for health problems relating to the eyes, fertility, the spine and headaches. The Emerald is also used to enhance mental capabilities.