material

Hi to all, I saw this medallion/coin and I am interested what you think is this a medallion or some Greece/Byzantine coin? The material is cooper or bronze. Thank you!

Hi, I am from Bulgaria. I saw this stone near waterfall high 2-3 m in a dere in West Balkan. If fact there are 2 more deres in the same plase which came in one later on afrer 20 m or so. Near there are also some stones of yellow sand material mixed with small broken stones as horasan on the...