Source of cracking on surface

Anyone have an answer as to what caused the cracking on the surface of this coin?

 

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This is crystalization, for more info have a look here
https://www.forumancientcoins.com/numiswiki/view.asp?key=crystallization

 

Thanks, pprp.

 

Handle that coin very gently, as it may shatter easily.

 

Yup, I could see that one shattering if you dropped it...

 

I bought a RR denarius that had a clean break due to crystallization. Bummer I don’t think there’s any way to reverse or even stabilize at that point

 

This is very nice coin. I like the rendering of Philip II of Macedon on the obverse as well as the well centered reverse.

Yes, the surfaces are somewhat crystallized due to horn silver, but I have seen much worse.

Handle the coin with care, store safely, and it will give you enjoyment for years to come.

 

Nice coin

 

I find the surface patterns formed by crystallization interesting, even attractive, particularly on toned silver like that Philip II.

THESSALY, Larissa. AR Hemidrachm.


THESSALY, Kierion. AR Trihemiobol.