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Hanban
IMG_2643.jpg  IMG_2644.jpg  IMG_2645.jpg  IMG_2646.jpg 
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prep01
Unfortunately your camera had been focused on the tape measure rather than the face of the specimen! You have not given details of where found, geology etc either.
Colin Huller
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Anonymous
Brook, IOW is a known dino site. Looks like a piece of bone from the honeycomb texture but its been rolled around on the beach so long that its become very rounded.  
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Matthew Myerscough
Yes, I think this is bone, although as Colin has said a focused picture of the cross section would help.  I have been told by an expert that the majority of rolled bones from Brook Bay are likely to be from Iguanodon, about 125 million years old, well done!
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prep01
I apologise for mis-reading where it was found 😠. I agree with Matthew, but would still like to see better cross-section photo.
Colin Huller
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Hanban
Thanks for comments i’m still trying to work out how you post properly on my phone , I think it may be easier on my tablet. Here hopefully is a more in focus image😊8C537840-7E82-4BF4-B92E-6C2AD0DF1190.jpeg 
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Weald on Bed
Definitely bone. Even with the blurry pics, you can see the clear difference between the trabecular (spongy core) and cortical (hard dense exterior) structure. Colouration is typical of the Wealden group deposits, which is what you're in the midst of at Brook (~125 million years old).
The flattened shape with cortical bone on both sides suggests either a vertebral process or chevron bone (i.e. the flattened 'spines' that stick out above or below the backbone to provide muscle attachment points) but TBH it's unlikely to be distinctive enough to diagnose more precisely. Even so, it's  a nice little piece.

Brook can be very hit and miss, depending on how much the beach is being scoured by the sea. I once spent a week there in very calm conditions and found nowt!
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Hanban
Thanks so much for the added information, and appreciate everyone taking a look, I’m learning loads already , my boys are going to be so happy they have actual dinosaur bone. 

Do I have to worry about the way I store it, at the moment it’s in a plastic freezer bag (obviously not in the freezer!)
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prep01
No, just wash it with a soft toothbrush, dry in air and that's it. What you could do is to grind and polish the cross section and outside for a permenant glass-like finish.
Colin Huller
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