I have put gold dust in a vinegar salt solution. It has turned blue. 1. Does that mean gold dissolved into the mixture? 2. Or does that mean the possible impurities dissolved into the solution? 3. Are there any eco friendly things (ie zinc copper) that will precipitate the gold?I can't use electromagnetic energy, whatever it's called. I don't have a battery. Also, I'm allergic to bleach. I read about someone finding that cornstarch works? why? 4. If I heat up the gold @30% evaporates I think. If I made a top like the one that goes on a food processor and feeds in the dust when the air is saturated and cools will it recondense into bigger pieces?