I just saw the Feruchemical Table medallion on the store, and it reminded me of a question that was raised on the forums a little while back. It appears there's a mistake in the metal pattern, with regards to pure metals and alloys; Chromium and nicrosil are in the opposite places from what we'd expect. I've attached a color-coded example; with pure metals in green, and alloys in blue, it's evident that the Spiritual quadrant has them criss-cross, unlike the other quadrants. The medallion matches the poster's layout; that's where the question originally arose, from the poster. Is there a reason for this switch? Or is it an error in the pattern?
I just looked over the chart, and rather than the metals being in the wrong places, it looks like I accidentally swapped the symbols. So the medallion is correct. It's the symbols for chromium and nicrosil that ought to be swapped. I've cc'd Peter on this email, too, so he's aware of the mistake. I'll try to remedy this for future printings.