Question on how coins tone.

smprfi

Does toning begin in specific areas of a coin or is it completely random?

mbbiker

This is one way coins tone

airplanenut

More likely than not it is in a random spot... normally a reaction to something that touches it- be it a holder, a bag like the morgans, or even air...

Sulfur is a great toner for silver, although black is a common result

Jeremy