How do you know it's gold? Don't look like gold to me, but then again I'm not wearin' my glasses.....
it looks more gold sitting here then it does on the comp, it could be something else i really dont know
The radiate crown is the distinguishing feature. If it's silver, it's an Antoninus. If it's brass, it may be a Dupondius. I don't know if the Romans made gold coins with radiate crowns.
Roman Imperial Bronze antoninianus of Claudius II, Rome mint, 268-270 AD. Radiate, draped bust right IMP CLAVDIVS AVG Victory walking left VICTORIA AVG, S in left field RIC Va 106
Not a very good distinguishing feature. There were plenty of laureate portraits on dupondii. And this antoninianus is brass, as were most after the reign of Gallienus. Under Trajan Decius, there were even radiate double sestertii. In the late 3rd century, radiate portraits were used on gold.