Hi. I have successfully collected a bunch of "Stone asteroid chunks", that I can use in an assembler to crush into "Stone chunks". But I can't see a way to refine those into stone ore.

Your description says that I should refine them "again", but none of my buildings seem to accept them as input. Your images show a recipe that breaks them down but I can't see where you say what building accepts that recipe.

I've done all the research that I think is relevant (I'm well into the infinite levels now), so I am lost. There seems to be something that's "pretty obvious" to everyone except me!

It's usually made in assemblers, same as the previous recipe. If you have Krastorio or Angel's installed it would use their crushers by default however.

Ah, I've found the source of my confusion.

The two sets of recipes are on different tabs in the assembler. One is on the asteroid-specific tab (which seems sensible), but the other one is on the intermediate products tab. I wasn't expecting that :)

Thanks,