What causes discoloring of coins in ground even if not old

[49er12]

Yes I no depends on factors, but if the ground is always wet, nickel, dimes, penny, quarter get nasty and get ugly even if they are 1960s and older, anyhow these can never be cleaned properly, is baking soda white vinegar a good solution or not really, anyone no appreciate it, thanks again

 

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[worldtalker]

Get yourself a rock tumbler.

GOD Bless

Chris

 

[Darke]

Oxidation colors can vary be soil contents and some soils quickly start galvanic corrosion. Damage also depends how acidic or alkaline the soil is. Zinc based coin fare the worst since they make excellent anodes. Salt and vinegar can clean them quickly...sometimes too quickly. For heavy corrosion a tumbler like worldtalker suggested is quick and easy. I use a vibratory tumbler from Harbor Freight.

 

[Professor of Engineering]

A rock tumbler as stated above...Harbor Freight dual tub!

 

[smokeythecat]

I threw all my old coins in a machine at the bank, dirt and all! You should have seen the looks I got.