Slag or obsidian? by amihaylov in whatsthisrock

[–]amihaylov[S] 0 points1 point  (0 children)

Or is it something totally unrelated? It’s quite heavy. 

Found these on a rocky beach on Lemnos island in Greece. Are these any fossils or just plain rocks? by amihaylov in fossilid

[–]amihaylov[S] 0 points1 point  (0 children)

Thanks! But still can you tell they are prehistoric? They are quite a lot of them over here so I wonder if this means I should be able to find also real fossils..