Damn, I thought I'd reread this to be able to read the new chapters, but this manga is probably among the absolute worst offenders in the whole category of isekai where the MC keeps introducing new things the locals and not even doing good job at that. The author was probably really struggling to get through middle and high school with passing grades. Like extracting every metal she needs from the ore she got from the blacksmith. It seems like the author believes "ore" is a single type of material from where every metal/other desired element can be refined from. Like there aren't different ores/minerals containing different metals/rare earths (in oxides and such), but there is a single ore in the world containing them all.
Nah, I can't deal with this series anymore, with all that and the MC being so stupid.