That's quite a discovery, Slingsby. I wasn't able to duplicate your results, however. I put four iridium in the upper left slot, then a single iridium in each of the remaining slots. It resulted in one large iridium bar worth $1,125 and one large Palladium bar worth $3,200. Nothing else. Have you tested this again?
How strange! I'm running on a Mac - surely that couldn't make a difference? The result you got was typical of our tests with 4 + 7 Copper.
Our IRIDIUM results were:
Test 1 = Iridium 747, Copper 196, Supernovium 81,191
Test 2 = Iridium 880, Copper 110, Supernovium 76,266
Other results [all with 4 top left and then a single bar in the others] generated Large Bars as follows:
GOLD = Gold 1032, Platinum 918
PALLADIUM = Palladium 3200, Titanium 12,800
TITANIUM = Titanium 11,935, Palladium 3000
I'm completely out of Iridium at the moment, so I can't do another test until I get a Sim to France. I'll report back in a day or so once we've collected more!