Good morning all,
First question is after precipitation. I had a “YouTube perfect” aqua regia followed by drop. I got lucky on the amounts and it all happened in minutes. I used sulfamic and smb and immediately turned dark followed by clear with mud on the bottom. But much later as I let the solution sit I had a small amount of black particles precipitate out. Seems to share characteristics with brown gold mud but definitely black. Would this be another precious metal or I think I read somewhere that it could be gold.
Second question is about crucibles. Because I have made excess mistakes along the way one of them has to do with borax. I feel like my crucible correctly but in the past I added too much borax and buried gold. Last night I broke two of 4 apart and put in aqua regia to find what looks like a couple grams. (It’s tough for me to confess such a ridiculous amount but I’m doing it)
Only one other crucible has a small slurry on the bottom and I’m wondering if when I put in gold mud if it can blend with the melted excess borax to make shiny yellow borax that can’t be separated by heat. And possibly I considered if even after I have glazed the crucible if I’m playing with melted gold for too long with oxyacetylene could I melt away that glaze causing some gold to become absorbed in the crucible?
Thank you!
First question is after precipitation. I had a “YouTube perfect” aqua regia followed by drop. I got lucky on the amounts and it all happened in minutes. I used sulfamic and smb and immediately turned dark followed by clear with mud on the bottom. But much later as I let the solution sit I had a small amount of black particles precipitate out. Seems to share characteristics with brown gold mud but definitely black. Would this be another precious metal or I think I read somewhere that it could be gold.
Second question is about crucibles. Because I have made excess mistakes along the way one of them has to do with borax. I feel like my crucible correctly but in the past I added too much borax and buried gold. Last night I broke two of 4 apart and put in aqua regia to find what looks like a couple grams. (It’s tough for me to confess such a ridiculous amount but I’m doing it)
Only one other crucible has a small slurry on the bottom and I’m wondering if when I put in gold mud if it can blend with the melted excess borax to make shiny yellow borax that can’t be separated by heat. And possibly I considered if even after I have glazed the crucible if I’m playing with melted gold for too long with oxyacetylene could I melt away that glaze causing some gold to become absorbed in the crucible?
Thank you!
