Completely Unknown Potential Fossil Mersea Essex

[Molly.Humphrey]

Hello,

 

I went to East Mersea yesterday to look at pebbles, shells, and fossils, and found this with a really interesting grain. I love pebbles with layers, but to me these layers do not look like the layers I usually see in rocks, they look very much like wood grain. I have searched and searched online for something similar and I just can't see anything that quite works. Is it a fossil? If so, what could it be? I'm just not sure. It isn't light weight, it is heavy like a pebble. I have included pictures of it wet and dry, plus 10 times magnification as best poss. Thank you for any help 

[JamieLynn]

since there are no pore structures visible, like you would find in a worn bone fragment, I would consider this a water tumbled layered sedimentary concretion

[Molly.Humphrey]

I am wondering if it is Gneiss, but it still doesn't quite look right. Thank you for your information though as it should point me in the right direction 

6 minutes ago, JamieLynn said:

since there are no pore structures visible, like you would find in a worn bone fragment, I would consider this a water tumbled layered sedimentary concretion

 

[FranzBernhard]

1 hour ago, Molly.Humphrey said:

Gneiss

That´s indeed a possibility. Lots of variation, its a big group. Bright, dark, coarse, fine. And could be grading into quartzite without clear distinction.

Franz Bernhard