It does appear to be a gold stater of Alexander III of Macedon circa 323-323 BC. The weight should be at least 5.5 grams. Looks like Price 2079. Can you remove it from whatever the holder is a take a better picture? It's looks like it may be real but it's difficult to say from the picture. Also this coin type is very often copied. You can find a few examples here: http://www.acsearch.info/search.htm...r=0&company=
I'm also moving it over to the Ancient Coin section.
I'm also moving it over to the Ancient Coin section.






















