These ancient Greek coin earrings are set with a matching set of Alexander III The Great of Macedon coins dating from 336-323 BC.  The front facing side depicts the head of Herakles wearing a lion-skin headdress, and the reverse shows Zeus enthroned holding an eagle and scepter with a lyre to his left.  You also see the monogram "A" for Alexander below.  All coins come with certificate of authenticity.