Why did you tumble the work?
When I took the two 10k rings out of the pickle they were covered
with an almost rust like coating. That is why I tumbled them.
This is the first time I’ve ever seen anything like it. I would
assume it was something in the mounting on the 14k solitaire that
reacted in the acid, but i don’t know why it would deposite on the
10k rings and the solder joint on the 14k chains catch. Appearantly
it was the higher copper, silver, or other alloy content that it was
The coating is not the problem. It is easily removed by buffing,
nitric acid wash, or heating. Im left wondering what the mounting
contained that would cause this problem and how to spot this
potential problem in the future.
I belive it could be either silver or nickle alloy in the mounting.
I have had both silver and gold jewelry pickleing in the same
solution at the same time and did not have such a reaction take
place. Thus I would eliminate silver content as the problem. That
leaves nickle as the culpret. Once again I am left with more
questions than answers. Does nickle form a brown sulfate salt? What
could the 10k rings and solder be alloyed with to precipitate the
nickel? Iron, magnesium, chromium, titanium, scandium,aluminum, and
manganese are the only metals more reactive then nickle. It seems
highly unlikely that any of these would be present as a gold alloy.
Does anyone see something I have overlooked?