Powder, we mixed into a solution, very much remember that. I believe it was matte? I vaguely think part of the thing that might have stuck with me was how vibrant of a blue it was despite lacking sheen, but I may just be filling in some memory blanks here.
Was it copper sulfate powder?
maybe. Pretty decent chance. might be twisted by time but I remember it being a very vivid blue. closer to a cobalt?
Mixing copper sulfate solution with ammonia makes a darker blue coordination complex.
Was it a powder, a solid or a liquid? Shiny or mat? Give me some more details on what it looked like.
Powder, we mixed into a solution, very much remember that. I believe it was matte? I vaguely think part of the thing that might have stuck with me was how vibrant of a blue it was despite lacking sheen, but I may just be filling in some memory blanks here.
It probably was copper.
Yeah, copper(II) sulfate was the first thing that came to mind, also.