Interesting crystal behaviour

So I've been making some copper sulphate for crystal growing, using an in situ nitric acid intermediate as opposed to an electrochemical setup. I had quite a bit of crude solution remaining after converting the majority to the oxide and hydroxide, so I left it to crystallise for a few weeks to examine the morphology of the crystals that formed. What's interesting is the fluffy, coral like structures of (what I presume to be) KHSO4/KNO3 that have managed to grow in the open atmosphere, and the globular formations of contaminated CuSO4. Won't be much of a task to purify the sulphate either as you can see.

Whoops, changed K2SO4 to KHSO4 because I just realised that bisulfate won't react with potassium nitrate.



[Edited on 20-9-2017 by LearnedAmateur]