Board Thread:Local Games/@comment-3225604-20150410095116/@comment-26235098-20150420143111

Yes. copper (II) sulphate pentahydrate... the blue crystals.

Oh rats! I screwed up the formula, didn't I! :D

CuSO4*5H2O thank you for catching that! :)

And, fwiw, fiona's sockpuppet nomination is invalid anyway, per the rule that it has to be something visible. So no, you should not accept it.