the green crystals are a bit of a mystery- they should be Copper Sulphate crystals so they should look like the really dark blue ones below.
When the solution was put to evaporate, I just assumed it was a low concentration... now I think we have a mislabelled something in the chem store.
A challenge!
They're prettier than copper sulphate crystals. They remind me of palm trees, which is extremely cheering in this kind of freezing cold weather!
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