What percentage of mint state morgan dollars have been dipped?

Anyone have any idea?
Does anyone know under what conditions a 100+ year old silver coin would be naturally white? Perhaps ones that were stored in bags surrounded by other coins so that air circulation was minimal should have no toning? Or maybe exposure to heat and light is the key factor in whether or not a coin tones? What do you think?
Dan
Does anyone know under what conditions a 100+ year old silver coin would be naturally white? Perhaps ones that were stored in bags surrounded by other coins so that air circulation was minimal should have no toning? Or maybe exposure to heat and light is the key factor in whether or not a coin tones? What do you think?
Dan
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I firmly believe in numismatics as the world's greatest hobby, but recognize that this is a luxury and without collectors, we can all spend/melt our collections/inventories.
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