I’m not very sure what this is, I think it is the results of a failed attempt to make the Divine Water using sulphur and urine from last month. I left it under the furnace to cool down then forgot about it.
The colour is odd and a bit nice though.
(It is of course best practise to wash everything up after you are finished with it. On the other hand this isn’t doing science or analysis, this is re-creating things that people might have done and seen in the past. Therefore leaving something aside for a month can be interesting, with the formation of odd crystals, the expected sort of crystals and strange liquids which they might have seen in the past)