John II Comnenus (1118-1143), Hyperpyron, 4,36gram and 34mm, Sear 1938: John II Comnenus (1118-1143 ), Hyperpyron, 4,28gram and 32mm, Sear 1938: For comparison: They are both the same type coin. I just want to ask what the reason for the two different color/patina is? Is it because one of them has lesser carat? Or is this because one has been cleansed/soaked and thus it shines more?
If you hold them in hand they do have different color/patina. If you look at image 3 and 4 you will see that the left one is more "orange"-coloured than the right one. But perhaps I should have take a better foto.