So just you know, it doesn't get you more metals than Pulverizer or Macerator. But when you throw the stuff in the Infernal Furnace it would give you just a bit more in form of nuggets. Plus you get exp from it, not that much though. The nuggets are not even better than what Pulverizer gets you I think, not sure on that. At least they're only the type of ore you smelted instead of extra gold from copper like Pulverizer does. But since gold doesn't get any extras in Pulverizer you could mine that with Core and Infernal Furnace it and get extras that way. Fortune increases the chance for native clusters and you can place the ore down and mine it again to have another go at it.