In any case, it is indisputable that he was the first Persian king who coined on a large scale, and it is further certain that his gold coinage was regarded in later times as of peculiar value on account of its purity.

His gold darics appear to have contained, on an average, not quite 124 grains of pure metal, which would make their value about twenty two shillings of our money.
They were of the type usual at the time both in Lydia and in Greece--flattened lumps of metal, very thick in comparison with the size of their surface, irregular, and rudely stamped.

The silver darics were similar in general character, but exceeded the gold in size.

Their weight was from 224 to 230 grains, and they would thus have been worth not quite three shillings of our money.

It does not appear that any other kinds of coins besides these were ever issued from the Persian mint.