Water would be Blood, ice I think would be Lucentia, bone should be sinew as its a living organ not a piece of rock imo but I get the feeling Rosharans wouldn't see it that way plus Talus' Body Focus is literally bone, metals including impure ores would be Foil; Rosharans still don't know much about germs besides what the Heralds told them so I can't imagine they'd have tried Soulcasting microorganisms, this might happen in a future era, then categorization into Pulp or Sinew might depend on the type of microorganism, assuming Soulcasting microorganisms is even possible, no idea how they'd categorize viruses; Soulcasting plasma should not be possible for Soulcasters or Radiants, probably not Heralds either, the Surges were restricted by Honor and this amount of Investiture would also not be normally available for Radiants, if they find a way to unchain the Surges and a way to access a large amount of Investiture, I think this would fall under Spark. Soulcasting stuff in their liquid state is an interesting idea! Though given the rule of perception, they might fall under Tallow by virtue of their viscosity, perhaps. Assuming these are all even actual issues, given that Soulcasters probably wouldn't be able to do most of these things at all due to not having enough Investiture + restrictions and Radiants with access to the Soulcasting Surge not needing the specific gemstones.
I don't understand what you mean by Soulcasting into something colder, do you mean less energetic states of matter? Then we don't know as this is not scientific knowledge available to the Rosharans, so how they'd perceive it is up in the air. Soulcasting ionized or excited particles may not be possible. What do you mean by non-ambient pressure? Soulcasting an object at higher or lower pressure than standard atmospheric pressures? That's possible. To Soulcast stuff to be in a pressurized state? That would be a very high level skill, I think. We do see Soulcasting between solid and gaseous, doing so safely would depend on the skill & power of the Soulcaster. Soulcasting an object to have a different velocity state would depend on the skill & power of the Soulcaster, I think, as they'd have to convince the object, I don't think Soulcasting projectile weapons would be better than having a gun though.