In Dwarf Fortress, dwarves who are in a strange mood will normally request an entire class of items (stone, metal bars, cloth). However, they can also specifically ask for adamantine wafers. The Masterwork mod adds iridium, which can be specifically requested in the same manner as adamantine.
The problem is, any dwarf metalworker which goes into a strange mood asks for iridium, and uses that as the base material. This means that instead of getting artifact quality slademantine weapons, I'm getting artifact iridium weapons which are less than half as good. How can I prevent the dwarves from asking for iridium? I am familiar with modifying the raws, but have been unable to find any place where that is specified.