Les French Posted April 17, 2020 Share Posted April 17, 2020 Hey ... I've got a 1959 franklin half in a slab holder ms64 but it looks like the coin is being taken over by this black substance . I dont ever remember seeing anything like this . Can anyone help me out here Link to comment Share on other sites More sharing options...
JKK Posted April 17, 2020 Share Posted April 17, 2020 It's toning. Slabs aren't hermetically sealed that I know of; plus, we don't know if this is a grading service slab or just a home encapsulation. That's what silver looks like when it tones up ugly. Link to comment Share on other sites More sharing options...
Greenstang Posted April 17, 2020 Share Posted April 17, 2020 (edited) Welcome to the forum As JKK says, it is just toning, I have a couple of silver coins in slabs that are completely black on both sides. Edited April 17, 2020 by Greenstang Added copy Link to comment Share on other sites More sharing options...
