I was wondering if anyone could help with an issue. I have noticed that a small number of PCGS slabs are cracking while in storage in my safe. Typically the cracks are internal spider-web like cracks that catch the light when tilted and appear in the "bubble" where the coin is housed. The coins are stored in a cool dry place and many others do not have this issue. Has anyone else had this problem and been able to solve it?
The size of the coin is not a factor it has been both large and small coins and different metal compositions of coin. The coins are also stored upright in PCGS boxes.
Oh, I thought this was for Spider Man silver bullion coins made by some small country. Anyway, moving along...
