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Hi everyone. Of all stones I have found, this one puzzles me the most and I don’t know what to think about it. It would be nice to hear from you, even if it would just mean excluding the possibility that it is a fossil. I'm sharing the photos and all the information that might be useful. The place: Mount Medvednica has risen some 10 million years ago, at an area of ex Pannonian sea. The mountain is made of palaeozoic and Mesozoic rocks. There are deposits of limestone and dolomite and various karst phenomena — there is cave explored 6km in depth 5km far, where the Neandertal man was found. There are many finds of shells and fish on the Medvednica (over 3000), and a couple of km further a whole whale skeleton about 13 million years old and 6m long was found (cub, the only specimen found of its kind). I found the rock on the forest floor while mushroom hunting, on a steep side beside a mountain stream, but not in it, on an altitude around 400m. The roots might have brought it up as there were many fallen trees around. The surface is dotted with intersecting lines, some more than 10cm and some only 2mm long. The general shape is triangular, it is flat (6,5-7cm thick) and has indentations on two on two opposite sides. The lines concentrate (more and more tiny dashes closer to the indentation). There is a tiny indentation on the “front” side as well. There are both “engraved” and bulging lines, so the texture is a relief. I have more photos, but this fits into the limit. I can add them if there's any need. I’ll appreciate your comments!

Greatings to all from Czech Republic. Please somebody have some ideas or somebody know ? It is a relatively heavy section filled with a grey silvery mass, irregular spherical shape. Its from place included in the late cretaceous period where was shallow sea and limestone, cretaceous subsoil. Nice evening to all and sorry for my anglish :-)