Hello all,
I found this 50 sen silver coin near my house here in Japan a few days ago.
I live next to a mountain, and located this piece where a house once stood.
Now, please understand that I did google plenty, but I didn't find a solution for cleaning this coin.
It has a dark, blackish crust that is extremely hard. Rough spots mixed with what feels like grains of sand litter almost the entire coin. I tried to freeze it in water a couple of times and a few pieces came of revealing an unharmed coin underneath. That is no longer effective.
Soft toothbrush and toothpicks does absolutely nothing.
What's behind this "crust"? minerals?
Is it possible to clean it?
I just started detecting so even the most basic advice and/or explanations are welcome!
Anders
I found this 50 sen silver coin near my house here in Japan a few days ago.
I live next to a mountain, and located this piece where a house once stood.
Now, please understand that I did google plenty, but I didn't find a solution for cleaning this coin.
It has a dark, blackish crust that is extremely hard. Rough spots mixed with what feels like grains of sand litter almost the entire coin. I tried to freeze it in water a couple of times and a few pieces came of revealing an unharmed coin underneath. That is no longer effective.
Soft toothbrush and toothpicks does absolutely nothing.
What's behind this "crust"? minerals?
Is it possible to clean it?
I just started detecting so even the most basic advice and/or explanations are welcome!
Anders