As promised here is the second of my finds from the yorkshire coast recently . Id like to add that these were all found within 100 yds of each other and within an hour and a half .
Once again many thanks
It is hard to tell. The rock it's self is just a rock, but the thing inside looks like a brachiopod/bivalve, but I'm not sure.
Did you find any ammonites? They are very common on the Yorkshire Coast.
Its safe to say that all rocks are just that my friend . Unseen to these pictures are the tell tale cracks in the shell . Cracks which would not correspond to just a rock .
Also im well averse to what lies on the east coast shorline having trawled it for the best part of 35 years . I have often found said items amongst many other common finds but these my friend are very different . Thanks for your opinions they have been catalogued
This is is an almost perfect pyritic nodule from bed 33 of the cannonball doggers around Whitby.
You can see the pyritic crust (about a quarter of an inch thick) and the inner Jurassic limestone, these are beautiful when if you can split it in half you find an ammonite and get it professionaly polished it will turn golden because of the pyrites.
I have some images on my desktop computer that I will post tomorrow of prepped and polished cannonballs.
They are for sale on certain internet sites but are very expensive.
They are dangerous to split because they tend to shatter and the edges are as sharp razor blades.
I find them on the Holderness coast sometimes with a good coating of pyrites and sometimes with the crust worn away in the beach system.