I think I know what your getting at. It would appear the images posted were taken with the camera's white balance decidedly warm. Would be great to see photos taken under natural light with a 'neutral' white balance. That way, perhaps we could respond more completely. Thanks.
Looks to be environmental staining/toning/discolouration. Could even be a plating that has mostly worn off? Whatever it is, it's post mint damage I'm afraid.
They look to be roller lines of some sort, similar to what you see with the early 80's cents. I don't know much about dimes and tried to find something on the net about them but came up empty. They correspond the same way a Lincoln roller line occurs with the obverse running with the reverse but the rough texture has me perplexed, maybe just where it's a clad coin. Maybe someone with more knowledge will chime in.
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