Gold fill over Brass

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dofustofy

Active member
Joined
Feb 11, 2024
Messages
26
Location
Texas
Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin
 

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  • IMG_20241030_085532628.jpg
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Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin
 

Attachments

  • VID_20241030_091637591.mp4
    47.2 MB
Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin
If you added AR there would not be anything to filter out.
All the metals should be dissolved.
 
Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin

I guess he is saying that his foils dissolved nicely, (nothing found in the filter) but he did not see it back after SMB?
Yes, that is correct. If you look closely at the screenshots I uploaded you can see the test sample has some odd precipitate form at the bottom of the beaker.
 

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Yes I have a stock pot and all that solution is still in my stock pot from my previous attempt and today's which was only a test of those gold foils I have sitting in the bottom of my beaker
To give you guys an idea of where I'm coming from I tried this last month with some previous gold fill over brass that I had acquired and I treated the experiment just like it was gold fill over silver. Nothing new except I get nothing after SMB. It's very strange.
 
Perhaps there is simply little gold in reality.
Brass is not directly coated with gold.
There is an underlayer of nickel that makes the foil look so thick.
 
That is the mystery is it not, I'm wondering if he expected the Gold to still be there.
That was the reason for my the way I replied.
If I'm understanding you correctly you're saying that you thought that maybe I was thinking Gold foils
Perhaps there is simply little gold in reality.
Brass is not directly coated with gold.
There is an underlayer of nickel that makes the foil look so thick
 
Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin
Can you confirm.
Is it Gold filled or Gold plated?
There is a major difference.
 
If I'm understanding you correctly you're saying that you thought that maybe I was thinking Gold foils
You are double quoting so to whom is the question directed?
If it was me I wondered if you expected the foils to be intact after AR.

This phrase do hint at that:
My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB
 

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